@whyberg Nope... that feature is part of the CPU. But is that the actual problem? Maybe... As that machine is too old to do any real work, it's a fine toy. There are better faster cheap test machines available.
Not sure If correct but the vhd-tool check seem quite basic.
Looks like it only do kind of a "wrapper" check and not a full integrity check
$ vhd-tool check 4156d2ea-d39d-436d-b89f-06ad64949c53.vhd
0 START of section 'footer_at_top'
1ff END of section 'footer_at_top'
200 START of section 'header'
5ff END of section 'header'
600 START of section 'BAT'
195ff END of section 'BAT'
67a00 START of section 'locator block 0'
67bff END of section 'locator block 0'
67c00 START of section 'locator block 1'
67dff END of section 'locator block 1'
67e00 START of section 'locator block 2'
67fff END of section 'locator block 2'