Windows cannot find “url”
September 9th, 2009 by 
Marius Hanganu
If you’ve encountered this message: “Windows cannot find url” when clicking links in external applications (like for example Yahoo Messenger, Adobe Acrobat, etc), here’s the solution as stated here:
1. Open Explorer
2. Select Tools and then Folder Options
3. Select the File Types tab
4. Select Extension: (NONE), File Type: HyperText Transfer Protocol
5. Click Advanced toward the bottom of the window
6. In the Edit File Type window, select open and click Edit
7. Clear the DDE message box (which should contain “%1″)
8. Click OK, Click OK
9. Repeat for File Type: HyperText Transfer Protocol with Privacy
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