KICK ALL BUTTS

Before installing new hardware, boot Windows 7 normally
Disconnect all external hardware except mouse, keyboard and main display. If your system folders are located only on C: drive, disconnect all other hard disks except that containing the C:. In case of relocated system folders, for instance the profile folder Users located in another drive and other system folders on C:, first move the relocated system folders back to C: then disconnect all other drives. Reboot after this
Run Command Prompt as administrator
Type to Command Prompt: %windir%\System32\Sysprep\Sysprep.exe, and hit Enter Sysprep generalizes now your Windows 7 setup and shuts down your computer. Do not run any other programs during this phase! after computer shuts down Switch the main power of your PC off and install the new hardware OR dismount the hard disk(s) and mount it (them) to a new computer
Boot the PC from sysprep generalized hard disk. You will notice Windows booting as if it was the first boot after installation, installing default drivers and updating registry. One or two reboots are needed, depending on your system specifications When Windows finally boots up, you will need to enter all information as if this really was a new, fresh installation
When login screen appears, choose your old user account to login Windows boots now to default OOBE first boot desktop, with default 800*600 resolution and default theme. All your installed applications are there, as well as your old user profiles and folders. Windows has installed the default drivers for your setup, you can update them if needed