All programs are started as PDF Files
My PC turned my start menu programs and almost all of my desktop programs into PDF files. How do I turn them back?
Keys to the Problem All programs are started as PDF Files
Reset the lnk - Shortcut link (LNK) files.
Restore Default Windows 7 File Extension Type Associations
How to Unassociate a File Extension Type in Vista and a utility to help (Windows 7 too)
How to Set Default Associations for a Program in Windows 7
How to Change the Default Program a File Type Opens With in Windows 7
How to Associate a File Type or Protocol Default Program in Window 7
How to Hide or Show Known File Type Extensions in Windows 7
Hope this helps.
Rob Brown - MS MVP - Windows Desktop Experience : Bicycle - Mark Twain said it right.
Open Action Center by clicking the Start button Picture of the Start button, clicking Control Panel, and then, under System and Security, clicking Review your computer's status.
Update and run your antivirus software. Windows doesn't come with antivirus software, but Action Center can often monitor the antivirus software that you or your computer manufacturer have installed.
Another Safe way to Repair the Problem: All programs are started as PDF Files:
How to Fix All programs are started as PDF Files with SmartPCFixer?
1. Click the button to download SmartPCFixer . Install it on your computer. Open it, and it will perform a scan for your computer. The errors will be shown in the scan result.
2. After the scan is finished, you can see the errors and problems which need to be repaired.
3. When the Fixing part is finished, your computer has been speeded up and the errors have been fixed
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