What has happened is your EXE files have become associated with an Adobe format (this is a known Adobe 9 bug). In order to revert them back to their original format you must follow these steps: 1) download the EXE reg file (link below). 2) Save the .reg file to your desktop. 3) Right click on the downloaded .reg file, and click on Merge. 4) If prompted, click on Run, Yes (UAC), Yes, and OK. 5) Finally, Log off and log on, or restart the computer to apply. (If you do not see a Merge option when you right click on the REG file, then you will need to check in Default Programs to set the reg file extension to have it's Current Default program set as Registry Editor (C:\Windows\regedit.exe). Afterwards, try merging the REG file again).