Sometimes, a program associates itself with a compressed file, ZIP, and it opens with a lot of jibberish. It can be a pain, as the normal file association technique doesn’t work right.
Here is how to get Windows to open your ZIP files again:
1. Open a command prompt as Administrator. Start > Accessories > Right click Command Prompt and select Run as Administrator.
2. Type: assoc .zip=CompressedFolder and press Enter.
That’s it. Your zip files are now able to open with Windows.