I have an AcerPower F1 PC Running Windows XP Home Edition SP2 (Fully patched)
Only recently, (my machine is around 18 months old), after booting up I am unable to use the PC for a full 10-15 minutes whilst the hard drive is going crazy! I have disabled "restore point" and "indexing service" but to no avail, plus I have run both Windows Defender & Spybot Search & Destroy without either of them finding anything.
I also run Norton System Works & Norton Personal Firewall, and any suggestions to resolve this problem would be gratefully received.

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