zip file problems

I really have no idea what I did, and I’m gonna have trouble explaining this, so bare with me. When I try to download any sort of zip file it tries to open with other programs like valve addon installer or adobe reader. Nothing happens. It doesn’t open and it doesn’t work. How do I get it back so that it downloads as a zip folder and I can open it as such? Hope somebody can help me.

I can’t Right click any zip file.
Open With > Choose Program
Select ‘Compressed (zipped) Folders’.

Winrar or 7zip. Use them.