Hey, I've been having a problem with my computer very similar to the one in this thread: http://forums.techpowerup.com/showthread.php?t=15422 Some specs: Motherboard: ASUS A8R32-MVP DELUXE Processor: AMD Athalon 64 X2 Dual Core RAM: 2 gigs Basically I got a "CPU Fan Error!" message every time i started my computer. My fan speed was good, a bit over 3000 RPM, so I just bypassed it and kept using my computer as usual. After a while the motherboard would beep sometimes and the computer would freeze for a few seconds. This happened more and more often until sometimes it would do that nonstop and I had to turn the computer off by holding the power button. So I go into the BIOS and disabled the fan speed monitoring. That doesn't help, I still get the CPU Fan Error message. Here's where it gets interesting: After much fiddling around with the settings and BIOS and whatnot, it still gets the CPU fan error but now it seems to be unable to detect my operating system (Windows XP). It goes through the startup procedure and after the mobo screen it displays "Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key." The primary boot device is the hard drive, which used to have no problem starting up as early as this afternoon. (On another note, the CPU fan error seems to have stopped) I just would like some suggestions as to what is going on and how I can fix this. I'm pretty sure I destroyed my OS and will need to reformat or something equally silly. (By the way, I tried putting the Windows cd in the drive and booting from that and selecting repair the OS...it gave some error about not finding an OS to repair. If you think it helps I can go and get that error text again.) Thanks so much for the help.