What sort of Disk Check did you run? How did you get the software to run - was it something built into the system?
The 0xc0000020 status means that the media has changed - but from what and to what, we don't know.
STOP 0x21a errors are security errors - so malware must be considered first.
Do you have any way of scanning the hard drive to see if it's infected? If not, then try this boot disk which has some antivirus programs supplied with it: http://www.ultimatebootcd.com/
If the system is infected, and if your cleaning removes the source of the error - Windows may boot up.
Please let us know the results of this so we can make further suggestions.
My browser caused a flood of traffic, sio my IP address was banned. Hope to fix it soon. Will get back to posting as soon as Im able. - John
(my website: http://www.carrona.org/
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