This short guide will show how to de-associate file types from winrar.

If you are having problems still, then it's likely your winrar has integrated the .zip and .jar extensions.

to remove this simply follow these instructions:

1 - open up winrar
2 - go to options > settings
3 - select the integration tab
4 - de-select .zip and .jar
5 - click ok

Other applications like Windows Media Player and Quicktime will have similar ways of doing this too.