How about any "atomic clock" utilities that query the NIST time server and update your clock. If you've set it to be a certain delta from GMT (or coordinated universal time, or whatever it's called) you'd get the symptoms you see. Could you have installed one of those? Look in your startup folder.

PS: Try rebooting with the cable modem disconnected from your PC. If the problem goes away, I'd suspect a utility like I've mentioned.

[This message has been edited by pdhenry (edited 04-12-2003).]