windows net framework

hello there,
I have windows 7 with visual studio 2010 and net framework v4
I would like to install the net framework 3.5 but it says
"turn windows features on or off"
when I turn it on and off from control panel > programs > turn windows features
it does NOT work and I get that error message all the time..
how can I install it correctly?
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

JohnBusiness Consultant (Owner)Commented:
Installing .NET Framework 3.5 can only be done through Windows Features on Windows 7. What is not working?  (a) The Feature?  or (b) something that depends on the Feature?
... Thinkpads_User
XK8ERAuthor Commented:
how exactly do I install it?
JohnBusiness Consultant (Owner)Commented:
Go to Programs and Features. On the left, click on Windows Features and allow it to load. Then scroll down for .NET Framework 3.5.1 and enable it if is not enabled. I have .NET Framework V4 installed so my .NET 3.5 is checked but greyed out. I think V4 replaces it all.

Also, I have subcomponents that were not enabled (out of the box) and I have not enable them (no apparent need).  See below:

... Thinkpads_User
IT Pros Agree: AI and Machine Learning Key

We’d all like to think our company’s data is well protected, but when you ask IT professionals they admit the data probably is not as safe as it could be.

JohnBusiness Consultant (Owner)Commented:
I did a bit of reading because of this, and it appears that .NET Framework 3.5.1 as supplied by Windows 7 inlcudes everything back and including V2. I am not certain about V1.1 because it appears separately in the the list of installed programs, but not in the list of installed updates

V4 is additional and was a Windows Update at one point that I allowed to be installed.

Starting from here with Windows 7 is appears that .NET 4 and .NET 3.5.1 should accomodate everything out there. It does for me (as a user). .... Thinkpads_User
XK8ERAuthor Commented:
thats exactly what i have in my system
when i try to load dlls nothing is there.
i can run v2 and v4 apps with no problems
JohnBusiness Consultant (Owner)Commented:
You probably have to upgrade the apps to V4 then, because there isn't much else you can do with Windows 7. One article suggested enabling the Foundation components to provide compatiblity. You might try that, but I cannot vouch for it in any way.

Here is a page that describes how to test what is installed by checking registry keys. Do take care, of course, using the Registry.

... Thinkpads_User
JohnBusiness Consultant (Owner)Commented:
Go here:

and download netfx_setupverifier_new .

I did and ran it. Everything from V2 forward to V4 runs successfully and verifies. V1.1 does not, but that probably does not matter to me.

... Thinkpads_User

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
JohnBusiness Consultant (Owner)Commented:
Please try the tool above. I tried it on my two Windows 7 Pro machines and everything from V2 forward verifies perfectly. I do not even have V1.1 on one machine.

So does it verify for you?  And then, assuming so, if you have a problem with an application, it would be an application problem rather than a Windows problem.

.... Thinkpads_User
JohnBusiness Consultant (Owner)Commented:
XK8ER - Any followup on this?  You should at least know whether all your .NET Frameworks are installed.  ... Thinkpads_User
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
.NET Programming

From novice to tech pro — start learning today.