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How to change .sys file properties back to default?
I goofed when I checked the properties tab for a disabled driver called cdfs.sys,
I clicked Change on "Opens with" and seeing nothing appropriate listed hit "OK", but apparently I had selected Wordpad somehow. I couldn't set it back to "Unknown Application" so I closed the tab thinking no change would be confirmed if I didn't 'Apply" or OK but no such luck. Wordpad is now set as the default to open ALL .sys files. I'm afraid to resart or restore the computer as I don't what effect it will have, especially since I did a full infection check this session so UAC is currently disabled :/
How do I get the setting back to what it should be?
1 Answer
- ?Lv 76 years ago
Open the Registry Editor (regedit.exe) and navigate to the key
HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Explorer\ FileExts\ .SYS
In the right pane, right-click Application, then click Delete and Yes.
If you have any problem with or uncertainty about the task, I can provide a very short registry script to remove the errant entry.
