crcdisk sys on toshiba tectra a4

CRCDISK.SYS (on Toshiba Tectra A4)

I've gone back to about 25-6-06 and found a few postings about PC's/laptops hanging on bootup on/after 'crcdisk.sys'.......but no solutions.
Have tried restarting in safe mode, plus all the other options....
Have tried the 'repair' rom the installation CD, but all the report shows is: Root cause found: Failure while setup is in progress.
Has anyone got any further with this please?
Salamat

Windows Vista

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