vista and xp uninstal virus protection software from my pc

I have installed a virus software on my laptop and and desktop which I need to completely uninstal as it is giving me blue screen. restore and  windows add/remove programs have not been able to remove this program. Both the computers have become extremely slow and they stall. I not in favor of formatting hard drive. Please help
RangaraoSudhakaraAsked:
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arixsinCommented:
What AV software are you using? Norton, McAfee, etc?
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RangaraoSudhakaraAuthor Commented:
The antivirus from CA associates which is a package spyware and anti virus.
I think there are some compatibility issues. I dont want to argue with them. I just
want to get rid of this and move with some thing else like norton or Mcfee and which
would you suggest.?
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dbruntonQuid, Me Anxius Sum?Commented:
I' d go with either AVG or Avast.  Fairly light on system resources.

Uninstall instructions for CA products are here http://cainternetsecurity.net/Support/default.aspx?tabid=83
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