KB ID 0000281 

Problem

Also seen on Server 2008.

Solution

1. Click Start, in the search box type cmd > then right click the cmd icon and select “Run as administrator“.

2. At command line issue the following command,

[box]Bcdedit.exe -set TESTSIGNING OFF[/box]

3. Then Reboot the PC.

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Original Article Written 15/06/10