Sony Vaio Monitor Not Working.....Well sort of

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Short story, my monitor doesn't work when Windows loads

Sony Vaio PCG K23
Raedeon IGP 345M video card
Monitor works up until Windows loads.
Monitor works when running Ubuntu. Repeated 3 times
Monitor works when at C: prompt.
External monitor works when plugged in to port.

If I look hard enough I can see my desk top on the screen so I know it’s there
Have run System Restore 6 times from restore disc that were made on first use.
Have run System Restore 3 times by pressing the F10 key.
BIOS was still at default values, but I reset it anyway
Windows XP Home SP2 and is completely up to date.
All drivers are as current as I could find.
Windows indicates all drivers are working properly.
Refresh rate is at 60HZ.
I know the monitor works as it works fine with Ubuntu. However I cannot run one of the primary applications I need to use under Ubuntu so I have to have Windows loaded.
Sony tech support of no help.
Windows support of no help.
ATI support of no help.