Hello, Yesterday I got a virus on an Acer Extensa 5235 laptop. Said virus was turning on a fake antivirus whenever I opened a file, which wanted me to pay a price for a "cleanup". I wasn't able to turn anything on. Luckily, I managed to turn it off through msconfig and delete the virus files. Right now, however, the laptop won't even turn on. The "Acer" screen goes on, the _ flickers a few times in the upper left corner, and the laptop resets. I won't even get to a safe mode. The notebook had minimal differences from the factory preset, had Win 7 and worked until yesterday. I have a OEM Win XP home CD at my disposal at the moment. I have already tried: 1) Booting through BartPe and an .iso image of Windows XP on an USB flashdisk. To no avail; I get to the BartPe layout, but the BartPe file explorer shows no disks available. 2) Boot through the disk itself. At first, it didn't load, with the error "STOP: 0X0000007B (0xf78d2524, 0Xc0000034, 0X00000000, 0X00000000)", which I was able to circumvent by transferring from a SCSI mode to IDE mode in BIOS. When I installed Win XP, however, I had an error concerning a few uncopiable files, described for example here: - http://forums.penny-arcade.com/discussion/20110/cant-install-xp-from-any-disk-to-any-disk. I skipped everything and the PC now resides in a "minimal" Win Xp preset. With the former Win 7 configuration, of course, absent. I think I'd be able to fix this if I found the MSCONFIG settings for the Windows 7 I used before and which I mistakenly modified (I probably turned off something that now blocks the system from starting). Is it possible to do so through the new Windows Xp installation? The former Win 7 folder is untouched, Win Xp runs from another folder. Thank you very much for all help!