You have Windows XP, and it's asking for you to activate Windows, assuming that you require a product key. Did you buy Windows XP or did you get it without paying?
If your Windows XP was working fine before you got this message, it might be that you installed Windows XP trial, each version of Windows XP lasts 30 days for free, you then need a product key or some form of activation to keep using it properly.
If you downloaded XP without paying, it's likely that one of Microsoft's updates broke it:
Windows XP Genuine Advantage Notification checks to see if you're running a genuine copy of Windows XP and will notify you, if you aren't, it'll make suggestions on what to do without running a fully activated or licensed copy of Windows you cannot receive any proper support for Windows XP or any other Microsoft software that will run on it. You also won't be able to download any updates from Microsoft update or Windows update, until you confirm it is fully activated.
To attempt to troubleshoot the problem you could try the following :
1) Login as Administrator.
2)Start
3)all programs
4)accessories
5)System tools.
6)System Restore
7) choose the time, date, and month Windows XP was working before it was telling you it wasn't activated.
Click next your computer will restart and restore back to the chosen destination.
If that doesn't work i can help you to create a Windows XP disc, which is easy!
