If you are using Windows Vista then you should know it is time to update to the latest Service Pack 2 which is now available from this link.
If you were an eager beaver and have already installed a Vista SP2 Beta release you will have to first uninstall it, restart your computer and then go install the final release.
Also you should make sure you have all updates and security patches using such programs like the Belarc Advisor, available here.
