Blue Screen Error at Logon Screen

Computer was on (at normal desktop/no applications running) and while un-attended it went to blue screen. Error message: "A process or thread crucial to system operation was unexpectedly exited or been terminated. Technical information: *** stop: 0X000000F4 (0X00000003, 0X8ACDDC48, 0X8ACDDDBC, 0X8060577E) Beginning dump of physical memory ".

Now when I reboot, it gets as fas as the windows log-on screen and then error repeats. If I try to re-boot with last known good configuration, error repeats. It will boot to windows O.K. in safe mode.

Checked event log and see error " Drivers failed to load; "ehdrv" (Eset antivirus help file), "Fips ", "intelppm ", "oreans32 ". I understand Fips is releated to the HDD and intelppm is related to the CPU. Don't know what oreans32 is.

Tried to look for dump file and latest on that shows up was dated Oct. 2010. Appearantly it is not saving the dump file when this error occurs. (Just an assumption.) Unfortunately, I don't have access to the affected computer at the moment, so can't provide any extra details on system other than what's posted in my system spec's profile.

Tried to use my original Win/XP/SP2 installation disk and run "sfc/scannow" in safe mode from command prompt. It would not run; could not find application. NOTE: original disk is SP2, but current system is upgraded some time back to SP3. (Via internet download from Microsoft, not an upgrade disk.)

Last thing I was doing prior to blue screen, was copying home movies from panasonic camcorder (with internal HDD) to computer HDD via USB and with camera software. This software was installed almost 3 years ago and has always operated fine. After I completed this task I exited the software and left the computer idle; no applications running. Came back several hours later and had blue screen error.

I need a solution that does not involve wiping or replacing my HDD. Although most data is backed up on another computer, not all of it is. Thank you.

 

Unplug anything that is USB and see if this happens. Sometime a USB device not removed properly will do weird things.

 

Removing USB devices

I attempted to boot up after disconnecting USB devices, (mouse & wireless network adapter). However situation is now worse. Won't even boot to logon screen as before. Error says can not find config.sys file.
Attempted to boot with XP CD and do repair. Now get error saying system does not detect a HDD.

I don't think USB devices are the issue. HDD my now be dead.

How do I check for sure?