I have an ASUS P4C800-E motherboard with a 1 GHz memory chip that has been running with very little problems on Win 2000 Pro for 3 years. When it was new I ran Microsoft's boot up memory test and the memory passed. SUDDENLY I have a loss of desktop icons and programs are failing with memory errors. I ran Microsoft's boot up memory test and the memory failed.

I put the memory in another computer and it passes the test. As a test I ran the memory in this other computer for a week doing the tasks of DVR and key entry for a condo with no errors.

Could I have a bad BIOS chip or motherboard? Power Supply voltages are correct when I measure them.It might cause by a conflic
Does you computer have system restoreDownload and run Memtest86 on that PC for a couple of hours. You'll know soon enough if it is the RAM.

www.memtest86.com

What am I doing wrong??? I downloaded and extracted Memtest86 like you said and there is a folder named boot with 2 files named BOOT.CAT & MEMTEST.IMG. I tried making a bootable cd-rom with these files and my ccomputer attempts to READ them and just locks up.You can boot from a floppy (if you have a floppy DRIVE) or create a CD. You can'tt just copy the files you have, though, you have to burn the files as an ISO with Nero, etc. If you have never made a CD from an ISO, have a read:

http://www.google.com/search?hl=en&q=how+to+burn+isoI finally got it right and ran Memtest86 for 10 hours. It ran 17 series of test with zero errors. The Microsoft test originally took about 5 minutes but said my memory was bad.

My computer is water cooled and the CPU temperature went from 92 degrees to 112 degrees and stayed there during the test. The test must really WORK the computer.

My Icons are still disappearing and programs are failing to run even if I reload them.

I'm getting errors like this now:

The instruction at "0X027dd5lb" referred memory at "0X0000000c" The memory could not be "read"
Click on OK to terminate the program
Click cancel to debug the program.

What could be causing this?