How does Win7 cancel file association? Win7 open PDF file associated error handling method

Recently, users of Win7 system have reported that the wrong program was selected when opening the PDF file, which caused errors in other PDF files and could not open the file. What caused this? What should I do? In fact, because there is an association between the files, we only need to cancel the file association. Below, let's take a look at what the specific method is.

1, click the Start menu & mdash; running, and running a bar, enter & ldquo; regedit & rdquo; press Enter;

2, into the Registry Editor, press click to open the sequence: & ldquo; HKEY_CURRENT_USER \\ Software \\ Microsoft \\ Windows \\ CurrentVersion \\ Explorer \\ FileExts \\ .pdf;

3, the & ldquo; OpenWithList & rdquo; under registration entry, the right side of the window, in addition to & ldquo; (Default) & rdquo; outside the registry key values ​​are all deleted, and finally delete the "UserChoice" registration items can be;

The above is the Win7 open PDF file associated error handling method, through the above After the steps, you can open the PDF file.