atapi.sys blue screen

i have a dell precision m90 with windows xp.  i am getting the following blue screen error:
stop: 0x00000050....atapi.sys address B9F21797 BASE AT B9F0B000 DATESTAMP 4802539D.
also may have dowloaded rootkit virus because this error started after i clicked on a a link in an email...any suggestions?
itgal74Asked:
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edbedbCommented:
The first thing I would try is replacing the atapi.sys file in the C:\WINDOWS\SYSTEM32\DRIVERS folder with a known good atapi.sys file.
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itgal74Author Commented:
I can't even get it to boot into safe mode or the last known good configuration, keeps going to the blue screen.
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edbedbCommented:
In that case the only options are to slave the hard drive to another computer or boot the system with a boot CD.
You can do it by booting from the Windows XP install CD but it would be much easier to do it with BartPE or UBCD boot disk. Do you have any of these?
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itgal74Author Commented:
I don't have either of those boot disks.  I can try to slave it.  thanks for the help!
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edbedbCommented:
While you have it connected to another computer run virus and other malware scans on it.
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itgal74Author Commented:
It worked as a slave, copied the atapi.sys file over and now it will boot.
will run virus and other malware scans, THanks!
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