I just installed Win7 and was pleasantly surprised to find that it installed all the drivers for everything and it all worked fine with no problems, at first. I put in a new 1Tb drive for Win7 and saved the old drive in a USB housing to serve as a backup. I copied some program files off the backup drive and went ahead and installed some, even some written for XP and they all worked fine. Then I got a message saying that it needed to install URGENT SECURITY updates and I never installed updates for XP before because they always broke something but I figured they must have fixed that by now too so I went ahead and let it install the updates and everything still seemed OK. The next day when I started it up I got another message saying it needed to install a dozen more URGENT SECURITY updates so I went ahead and did them too then I started to notice problems. Some of my files were now locked but it was nothing serious at first. I connected my backup and tried to copy My Documents but I got a message saying Access Denied! Then if froze for a long time and I had to unplug it. After that I couldn't open the drive anymore to see any of the files! It wouldn't let me unlock the files and folders so the only way I could find to fix it was to use a system restore point to go back to the point right after Win7 was installed to get rid of all the updates and that unlocked all the files. Someone in another forum reported the same problem also but had no solution except to use System Restore. I don't know what it did to the backup drive but I still can't access it to get My Documents but I was able to connect the drive to my laptop and copy them off onto it and was able to finally get the files but it took hours. Whatever it was that Win7 did to the drive caused a problem opening or coping .pdf files. When it comes to one of them it will just sit there for several minutes doing nothing before they can be copied but it finally did manage to get them all off. I found that you can install Win7 right off the DVD and it works fine but if you install SP1 it will screw everything up so NEVER DO ANY OF THE UPGRADES!! Has anyone here run into that? How do I get my backup drive to be useable again?