I have a Dell Optiplex GX280 Machine that had a BSOD error code of (0xf4) rebooted the device and all was fine. Once the user tried to open up Microsoft Outlook the BSOD reappeared. Tried to reboot again and received a different error. No boot device available - strike F1 to retry boot, F2 for setup utility. I've tried several tools to try and fix this error. I tried UBCD for windows ( all the options). The funny thing about it is that inside the bios it's seeing the sata Hard drive. Any where else it's not detecting it. UBCD doesn't even bring up the c: drive. I tried to boot to the windows repair screen and can not even run chkdsk /r.