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You have Windows Server 2008 or 2008 R2 with Hyper-V enabled and an accelerated graphics adapter. You may experience performance issues when using the graphics-rich Visual Studio 2010 environment while taking advantage of Hyper-V for testing purposes.
An interaction between Hyper-V, CPU features, and accelerated graphics adapters causes this behavior. See the following article for more information:
To avoid these performance issues, try one of the following:
Windows Server 2008: use a non-accelerated graphics card, a basic graphics driver (VGA.sys), or an XP-based graphics driver. These options result in reduced graphics performance and functionality, such as loss of multi-monitor support.
Windows Server 2008 R2: use any of the options shown for Windows Server 2008, or ensure that the system supports a feature known as “Nested Page Tables” (AMD), “Rapid Virtualization Indexing” (AMD), or “Extended Page Tables” (Intel). This feature is present on AMD Phenom and Opteron processors, and on Intel Nehalem processors (Core i7 series, Xeon 5500 series). This is the preferred option since it allows one to gain full graphics performance and functionality without system slowdowns.
Windows Server 2008 R2 Datacenter, Windows Server 2008 R2 Enterprise, Windows Server 2008 R2 Standard, Windows Server 2008 Datacenter, Windows Server 2008 Enterprise, Windows Server 2008 Standard, Windows Server 2008 for Itanium-Based Systems