Configuration parser error has occurred

Hi,
I have installed Windows 7 Operating System to test some apps on Windows 7 environment but I got an error message every time I try to launch any app. I can’t understand what is the cause of this error?
I just want to know about this and get the resolution to fix it as soon as possible.
Please help me to fix this Error Parsing.
Thanks for any help.
GfxUI.exe – Configuration parser error
Error parsing C:WindowsMicrosoft.NETFrameworkv2.0.50727configmachine.config
Parser returned error 0xC00CE556
