the windows are closing on Windows (XP and Vista)
Support is ending for some versions of Windows.
If you're running one of these versions after support ends, you won't get security updates for Windows.
"An unsupported version of Windows will no longer receive software updates from Windows Update. These include security updates that can help protect your PC from harmful viruses, spyware, and other malicious software, which can steal your personal information..."
"There's no SP3 for the 64-bit version of Windows XP. If you're running the 64-bit version of Windows XP with SP2, you have the latest service pack and will continue to be eligible for support and receive updates until April 8, 2014...
"Even if you have an unsupported version of Windows XP or Windows Vista without any service packs, Windows will continue to start and run as usual."