Toshiba Reinstall Windows 7 hangs

Hi all.

Redoing a friends Toshiba Satellite A660 which CAME with Windows 7 Home 64bit, but he never did a recovery cd. He got infected with a virus bad- tried doing a F8 repair disk install and such, but it was pooched from the virus. So I backed up things to a USB thumb drive and went on to reformat his drive.

I used my Windows 7 Home 64bit and used his license key sticker on the bottom of his laptop and reformatted the laptop as a clean install (reformat).

Went fine, Windows 7 installing, and then when it goes to the (2nd?) reboot about name, network, etc...the computer hangs, unable to proceed. Tried reinstall without a key as well and same thing, hangs and BSOD's.

Even changed RAM, but same thing.

#$&@$%!!!

I wanted to get his system up and running for Christmas, so I put my Vista Business on it. Loads fine, reboots, fine, works fine...but want to get it to his Win7Home.

So I try to do a UPGRADE from within Vista Home to Windows 7 Home with my key in the sleeve to see what the problem is.

Again, Windows Vista starts installation, does the installation, and Windows 7 reboots. On the second/final reboot it says Windows 7 cannot be installed and reverts back to Vista.

So I'm sitting at Vista and trying to figure how to upgrade to Windows 7 for him.

Upgrading from Vista Home again and will see if I can catch the BSOD error, but it flashes and then reverts back to Vista on reboot.

Ok, reinstalled and got the BSOD - took a picture as it only stays on for 10 secs. 0x0000007e HIDCLASS.SYS.

Google result shows to be my Microsoft wireless mouse. Will reinstall without the mouse.

"I found out that the attatched USB reciever for mouse/keyboard was the reason for the error. After removing that device I had no more problems. The problem however will still occour if I attach the reciever again, even after completed install and update of Windows."

That was it...removed the MICROSOFT wireless USB mouse, reinstalled from within VISTA and Windows 7 loads. Now tell me why a Toshiba laptop would FUBAR with a stupid USB mouse, Microsoft even? First time seen it, and I work with Dell and HP's, same setup with same wireless mouse...