how to download directx 10 for windows 7 on the microsoft download site

DirectX® 11, the next                                                                                            generation of                                                                                            graphics technology,                                                                                            arrives with Windows                                                                                            7. This is great                                                                                            news for players as                                                                                            many of the newest                                                                                            Windows games will                                                                                            take full advantage                                                                                            of this technology                                                                                            to create more                                                                                            immersive and                                                                                            detailed worlds and                                                                                            experiences. Game                                                                                            developers will                                                                                            utilize new features                                                                                            to create rich                                                                                            worlds, realistic                                                                                            characters, and more                                                                                            fluid gameplay.                                                                                           

DirectX 11 features                                                                                            include:                                                                                                                                                                                                              
                                                                                                                                                                                                                                      Tessellation                                                                                                                    –                                                                                                                    Tessellation                                                                                                                    is                                                                                                                    implemented                                                                                                                    on                                                                                                                    the                                                                                                                    GPU                                                                                                                    to                                                                                                                    calculate                                                                                                                    a                                                                                                                    smoother                                                                                                                    curved                                                                                                                    surface                                                                                                                    resulting                                                                                                                    in                                                                                                                    more                                                                                                                    graphically                                                                                                                    detailed                                                                                                                    images,                                                                                                                    including                                                                                                                    more                                                                                                                    lifelike                                                                                                                    characters                                                                                                                    in                                                                                                                    the                                                                                                                    gaming                                                                                                                    worlds                                                                                                                    that                                                                                                                    you                                                                                                                    explore.                                                                                                                   
                                                                                                                   
                                                                                                                                                                                                                                      Multi-Threading                                                                                                                    –                                                                                                                    The                                                                                                                    ability                                                                                                                    to                                                                                                                    scale                                                                                                                    across                                                                                                                    multi-core                                                                                                                    CPUs                                                                                                                    will                                                                                                                    enable                                                                                                                    developers                                                                                                                    to                                                                                                                    take                                                                                                                    greater                                                                                                                    advantage                                                                                                                    of                                                                                                                    the                                                                                                                    power                                                                                                                    within                                                                                                                    multi-core                                                                                                                    CPUs.                                                                                                                    This                                                                                                                    results                                                                                                                    in                                                                                                                    faster                                                                                                                    framerates                                                                                                                    for                                                                                                                    games,                                                                                                                    while                                                                                                                    still                                                                                                                    supporting                                                                                                                    the                                                                                                                    increased                                                                                                                    visual                                                                                                                    detailing.                                                                                                                   
                                                                                                                   
                                                                                                                                                                                                                                      DirectCompute                                                                                                                    –                                                                                                                    Developers                                                                                                                    can                                                                                                                    utilize                                                                                                                    the                                                                                                                    power                                                                                                                    of                                                                                                                    discrete                                                                                                                    graphics                                                                                                                    cards                                                                                                                    to                                                                                                                    accelerate                                                                                                                    both                                                                                                                    gaming                                                                                                                    and                                                                                                                    non-gaming                                                                                                                    applications.                                                                                                                    This                                                                                                                    improves                                                                                                                    graphics,                                                                                                                    while                                                                                                                    also                                                                                                                    enabling                                                                                                                    players                                                                                                                    to                                                                                                                    accelerate                                                                                                                    everyday                                                                                                                    tasks,                                                                                                                    like                                                                                                                    video                                                                                                                    editing,                                                                                                                    on                                                                                                                    their                                                                                                                    Windows                                                                                                                    7                                                                                                                    PC.                                                                                                                   
                                                                                           While                                                                                            Windows 7 is fully                                                                                            compatible with                                                                                            games and hardware                                                                                            that use older                                                                                            versions of DirectX,                                                                                            the new DirectX 11                                                                                            features are                                                                                            available with a                                                                                            DirectX 11                                                                                            compatible graphics                                                                                            card and games                                                                                            designed to take                                                                                            advantage of this                                                                                            new technology.


Copied from: http://www.microsoft.com/games/en-US/aboutGFW/pages/directx.aspx

And I think this is what you're looking for:
DirectX End-User Runtime Web Installer: http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=2da43d38-db71-4c1b-bc6a-9b6652cd92a3

This looks like one:

http://www.technospot.org/files/file/6-files-for-directx-10-for-windows-xp/

But I would read these first:

http://www.tomshardware.com/forum/263265-33-directx-windows

http://www.technospot.net/blogs/download-directx-10-for-windows-xp-from-alky-project/

http://www.technospot.net/blogs/how-to-install-directx-10-on-xp-with-directx10-rc2-pre-fix/

Another one:
http://www.techmixer.com/download-directx-10-for-windows-xp/

download link under the second picture.

I don't believe you were asking about XP since your question mentioned windows 7.
Also I was giving the microsoft approved answer not the is it possible if you try to hack stuff in manually.
Perhaps you could tell us why you are trying to download DX10 on a windows 7 box in the first place.

whoops... my bad.  I don't know why I was thinking XP.   : /