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I had a similar problem and installed adawareSE... It went away after that. If you don't already have SE you should download it, it's free.
Stuart,Thanks!!It picked up 3 things that the Microsoft version didn't! I'll se how it goes.
I'm not convinced that its a spy ware problem, but its a good place to start. As stated before try several different spyware catchers none of them catch everything. Forget about a rebate, get an AV scanner now or stay off line. There are several free ones such as AVG and Avast. Also check out some of the Spyware related forums such as http://pcpitstop.invisionzone.com, they have a sub forum for viruses and spyware. I took a quick look but didn't see anything about clocks being changed, but post there and see what kind of feed back you get.
There are many times I go to bed and he's on the computer AND even sometimes the history is gone ... what ever happened to Playboy Magazines ...Anyway, thanks for all the help and hopefully it will go away.
Do a check of where your son has been surfinging- you may be suprised. I was. Apparently, there are a lot of places that you can find free porn. No need to spend good money on magazines these days. It took me many hours to undo all the damage from the spyware that these places slip into your PC. Now we have a firewall, spy killer software, spam blockers, virus scanns, etc.
There are many times I go to bed and he's on the computer AND even sometimes the history is gone ....