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How do I repair Windows 7 when Extensions are corrupted
How do I repair Windows 7 when Extensions are corrupted
example
Exe+Reg=Together
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How do I repair Windows 7 when Extensions are corrupted
example
Exe+Reg=Together
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By your example I'm not sure what you need. Do you just want to be able to rename a files' extension?
You can run this to start with,
SFC /SCANNOW Command - System File Checker
This may be helpful too,
Default File Type Associations - Restore