After installing Win 7 on this computer I decided to use the Easy Transfer system (using migwiz file) to copy documents and settings across from another computer that uses Vista. The transfer occurred OK and then required a restart on finishing. From that point onwards there was no way I could start this computer. I constantly received a BSOD followed by a screeen to select repair, safe mode etc. No matter what I did the machine would crash out and go through the same sequence again. I tried changing Boot priorities in the BIOS but still could not access the optical drive or anything else. I tried all sorts of BIOS settings but still could not get to the hard drive or the optical drive. In the end, I physically removed the hard drive, connected it to another computer and reformatted it. A reinstall of Win 7 went smoothly and this time I have done installations and copied files and programs one at a time, with no problems. The moral of the story is: DON'T USE EASY TRANSFER! Unless of course you have good restorable backups at the ready. Unfortunately I did not.