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How to delete a system file in Windows Vista
http://www.vistaarticles.com/articles/323/1/How-to-delete-a-system-file-in-Windows-Vista
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Published on 02/15/2007
 
How to delete a system file in Windows Vista

How to delete a system file in Windows Vista

1. First you need to take ownership of the file. Run takeown /f  "path and file name" to take ownership from a command prompt.

2. Next, you need to give your account full control permissions on the file. Run cacls "path and file name" /G <your username>:F to get full control from a command prompt.