I think my motherboard has died. I began getting these errors recently. First I got the BAD POOL CALLER error and system crashed.

After fiddling with it with no luck I attributed it to a bad IDE drive. Went out and bought a SATA and put it in. Even with just the NEW SATA drive and trying to install Windows XP on it I was getting 'Unmountable Boot Volume' when the the XP setup went to run. I looked around on the net and it seems to be a Windows error but like after Windows is installed? Other than that appears to be a BIOS error but my BIOS is updated and has worked fine for years.

Well I guess I have not tried everything. It seems in restoring my backup PC that my Windows XP disc itself is failing. My backup PC wouldn't read it. Lucky the copy of it I made the PC reads fine.

Also it appears damaged/crimped cables can cause it.

If the original XP disk itself is failing I'm sure it can cause a 'unmountable boot volume' error.
I got more investigating to do it seems.

Also this is the SECOND original, new Windows CD that has failed on me in a short period of time. First was my Windows 98se disk and now my Windows XP disk.