The occasional BSOD reads:

A problem has been detected and Windows has been shut down to prevent damage to your computer...
Technical information:

*** STOP: 0x000000D1 (0x0000000C, 0x00000002, 0x00000001, 0xF96C49ED)
DRIVER_IRQL_NOT_LESS_OR_EQUAL

NOTE: The four parameters may vary.

This issue will occur if your computer has been on standby for a long time, AND you are running the Sygate Personal Firewall on your Windows XP SP2 computer.

To fix this issue, ask Sygate if an update for the Personal Firewall program is available.

To workaround this problem, remove the Sygate Personal Firewall and enable the Windows Firewall.

NOTE: The Windows Firewall is enabled by default.