Windows product activation

[travis4prez]

I've seen quite aq few error messages, but no this one until now. "A problem is preventing Windows from accurately checking the license for this computer. Error code: 0x800900006"
The gory details. WinXP. I have been trying to swap HD's. with no luck. Tried copying partition to partition using partition Magic but no boot. (MBR?) So I gave up until I get a drive copy program. I pulled out the second HD to hook my CD back up and now I get that message when I log on and Windows immediately logs me off. Any idea what I may have done?

FYI: its a legal copy of XP

[muno]

Put that 'A problem is preventing <blah blah>' in google search box and you'll get many many suggestions.
-M

[vass0922]

also try putting the eventid of the problem from event viewer into a search at www.eventid.net

[travis4prez]

Well. I looked those up, but all the fixes and workarounds require getting into the registry. I've tried booting to safe mode, unsuccessful. Looks like it might be reinstall time.