|It looks like your file associations got screwed up.|
Fix your EXE file association. Download this:http://www.winhelponline.com/fileasso/exe_fix_w7.zip
Extract the .REG file to your Desktop. Right-click the REG file and choose Merge.
Alternatively, you can open the Registry Editor by pressing the WinLogo+R key and type "REGEDIT" (w/o the quotes) then click on File > Import. Merge the REG file's contents.
NOTE: If your EXE file association is corrupted, it can be difficult to open REGEDIT, or to even import REG files. To work around this, press CTRL-ALT-DEL and open Task Manager. Once there, click File, then hold down the CTRL key and click New Task (Run). This will open a Command Prompt window. Enter REGEDIT.EXE and press Enter.
For other file types that won't open:
For example, if you have a program shortcut that won't open, fix the LNK file association.