Note: This operation involves modifying the registry. Please backup the system disk important data before use and use it as appropriate.
Click "Start", then click "Run," type "regedit" to open the "Registry Editor": HKEY_CLASSES_ROOT\\\\txtfile\\\\shell\\\\open\\\\command, in Right click on the "Modify" button in the right box to delete the key value, then click OK.
Change the permission of the key value to "Reject... Full Control". Otherwise, it will be modified again after starting QQ. The specific operation method is as follows: Edit → Permission → Advanced → Select in the “Permission Items” box. "Administraras (computer name - PC\\\\Administraors)", its permission is "Full Control"; then click "Edit" → in the "Permissions" box, the "Reject" item on the right is checked all the way → OK → OK; in the “Windows Security” prompt window that appears, click “Yes” and then click “OK”. Final result:
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