I kept getting the Blue Screen: remove any newly installed hardware/software; update bios, disable bio memory option;run driver verifer;IRQL_NL_OR EQUAL; nv4_mini.sys, etc. not knowing what to do I downloaded the Registry Cleaner and "cleaned up" some files. I only guessed that these files may be causing my Blue Screen. I permanently emptied all of these files with CCleaner and restarted my computer. The computer came on but I was unable to launch any files or program when I doubled clicked them. I went to Computer to check there and it does not show any files or hardware. All I have is Windows screen with copies of the program shortcuts. I inserted Windows XP SP2 with hopes of reinstalling the files, but that does not launch either. I did manage to open a file with the DVD hardware and it said "Launcher_Windowsinstaller.exe" I know I really screwed up by not being technically knowledgeable. I downloaded Registry Cure using another computer and copied in onto a CD with the hope that this would solve my problem, but the program did not launch. Please advise. Thank you. Eljae