Windows XP users. 1  Click Start. 2  Click Programs, and then Accessories. 3  Click System Tools and open System Restore. 4  After processing, a window appears with two buttons at the bottom. 5  Make sure Restore my computer to an earlier time is selected and click.
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Windows Presentation Foundation (or WPF) is a graphical subsystem for rendering user interfaces in Windows-based applications by Microsoft.WPF, previously known as Avalon, was initially released as part of .NET Framework 3.0.Rather than relying on the older GDI subsystem, WPF uses DirectX. The 3D capabilities in WPF are a subset of the full-feature set provided by Direct3D. 2  However, WPF provides tighter integration with other features like user interfaces, documents, and media. 3  This makes it possible to have 3D user interfaces, 3D documents, or 3D media.