[electricant]

Happened to me on what, if I recall correctly, was a thinkpad t61. In the end it was due to outdated BIOS. Updating it stopped the PC from hanging up.

Perhaps check that your BIOS is the latest version first.

And by the way run also a scan of the RAM with memtest.

[chbkall]

The memtest86 routinely fails ... I guess that would be an issue with the RAM?

[anenefan]

If it lists addresses that have failed - Yes. Generally when the same addresses reliably fail up over and over you might get away with configuring so at boot the OS can ignore certain memory addresses or a range if that's easier. Otherwise replace the ram that's bad.