Mouse and Keyboard not recognized Win 7 hm prem

Windows 7 Home Premium.  After installing HP printer, on restart mouse and keyboard are not recognized.  Mouse and Keyboard work great in BIOS and up to the point where Windows starts.  Then unresponsive.  Tried every option I know and found on google.  Ran Windows restore disk, everything checks out fine.  Doesn't matter if it's a normal startup or safe mode.  Windows will not see either M or KB.  Called Dell...they say the only option is a clean reinstall.  i find it hard to believe for a Mouse and KB not working.  Boots fine in to Windows...normal or safe mode, but no M or KB.

Trying very hard not to flatten their computer.  Any thoughts?
trgreerAsked:
Who is Participating?
 
JohnBusiness Consultant (Owner)Commented:
I suggested above that you had to rebuild the computer http://#a39722133

Accordingly you cannot accept your later solution which is the same as mine.

.... Thinkpads_User
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JohnBusiness Consultant (Owner)Commented:
Is it a USB connected printer?  I wonder if that messed with the USB ports.  Can you shut down all the way, disconnect the printer and then start up.

Any luck?  

Can you try a different keyboard in a different USB port?

.... Thinkpads_User
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trgreerAuthor Commented:
Printer is not connected.  Different KB and Mouse, changed USB ports.  Booted with SpotMau, Mouse and KB work fine, so it's definitely the installed OS where the problem lies.  But, like I said...cannot use Mouse and KB when windows starts to load.  Can't find a way to troubleshoot the OS without them.
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tmoore1962Commented:
F8 and do system restore to a point prior to printer install. If that doesn't work you can boot from win7 DVD and try a repair
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JohnBusiness Consultant (Owner)Commented:
Something has corrupted your OS in a serious way. Does the computer have a PS/2 keyboard port?  And if not, the take drive out to a carrier to recover the data and rebuild the computer.
..... Thinkpads_User
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jcimarronCommented:
trgreer--
Try a Repair Install
http://www.sevenforums.com/tutorials/3413-repair-install.html
This should not affect personal data and installed programs, but a backup first is always a good idea.
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trgreerAuthor Commented:
No solution found, had to rebuild
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trgreerAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for trgreer's comment #a39733197

for the following reason:

No solution found.
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trgreerAuthor Commented:
Part of the question:

Called Dell...they say the only option is a clean reinstall.
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JohnBusiness Consultant (Owner)Commented:
@trgreer - Thank you for following up.  ... Thinkpads_User
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