Glohamer,
It did start after norton reject some infected emails, i have been looking for software that would check my pc for any hidden programs and sort far everything i have tried comes out clean even norton have suggested that there software does not alter the clock and they think i am daft. I have said to them and microsoft i will pay their costs to come and have a look and if it is happening they pay there own costs.
This has got me, done all the normal things checked bios, regional settings, pulled my hair out, and jumped up and down on the stop and none of these has fixed it.
Run out of ideas, need a fresh approach
Richard