Win7 file association error how to cancel

  

1. Click the Start menu & mdash; Run, and enter "ldedit" in the Run column, press Enter;
Run the input regedit

2. Enter the Registry Editor and press Click to open: "HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerFileExts.pdf;
Registry Editor

3, under the "OpenWithList", under the registration item, in the right window except the "default" & rdquo; The key values ​​are all deleted, and finally, the “UserChoice” registration item can be deleted;

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