Today on booting my system I got a blue screen with the message "Bad System Config Info." Further information given was: drive inaccessible. I ran the repair program on the Windows 7 DVD, trying all options, to no avail, but wound up getting the message that the registry was corrupt and nothing further could be done. I've also run CHKDSK from the command prompt. I have read it is possible to chose the upgrade option again and do a repair install, but I have hesitated to do this, because if the registry is corrupt and the upgrade option transfers all settings, won't it simply transfer the corrupt registry which is causing the problem in the first place? So at this point I am wondering if the repair install is a viable option. If not, is there anything else I can do from the command prompt that might solve this problem? Or if I can gain access to the file system of the drive by hooking it up to another computer, is there anything I can do then? I think I made a backup of the registry using CCleaner about a month ago. But I don't know how much good that does me since I cannot access my computer to run CCcleaner and restore the version of my registry it has saved. I also would not know what to do on my own ,manually, if I could access those files through another computer because I have never been in this situation before. Thanks in advance to anyone who can help me out with this. (One last thing: I don't know if this could be related but before any of this happened I had unchecked "Maximum Memory" in the boot tab, on someone's advice, and rebooted my computer, because I had thought all of my memory was not being seen by Windows; when I learned this wasn't the case and that part of the memory was allocated to the OS, I checked "Maximum Memory" again under the boot tab, and rebooted. I didn't have any problem on my first reboot after doing this, but it was after the second reboot that I got my first blue screen.)

Hi, Did you try system restore? Based on my research, the repair install only work within Windows 7, not at boot or in Safe Mode, currently, it is recommended to reinstall Windows 7. If you could hook your hard disk to another computer, I suggest you could backup important personal files. Alex ZhaoPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.