The exception unknown software exception (0x40000015) is not solved with just the clues given and also may be unsolveable if the app that crashed is unsupported on this OS.
Finally you wrote XP and not XP SP3 so my first thought is to get the OS up to it's last update.
Keep getting this Proxy desktop: Explorer.EXE-application error 0x0000015 at location 0x100891da. Running XP

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