I suspect I have a slightly broken version of XP. I would rather avoid the hassle of a full re-install of XP, so any suggestions would be much appreciated.
Symptoms are as follows:
1) When I get the XP logon password entry screen, if I don't enter my passord within a few seconds, the system will display my desktop, minus shortcuts and taskbar, and go into an interminable loop. The disk activity LED barely flickers, and the cooling fan starts up as the CPU just thrashes until infinity. Entering the Password within a few seconds results in normal behaviour (except for 2) below)
2) I am seeing similar instability at other times - eg, iTunes now will no longer play a tune - the PC just freezes as the CPU just loops. Certain web sites will also kick off the similar behaviour.
I can't track this to any specific install I have done. I have restored to the earliest point I could but to no avail.
My machine is a Toshiba Tecra M1, running XP Professional with SP2. All the latest updates have been applied.