Didn't know which to post this in, since it involves both the mouse and tabs (like tabbed chats in MSN and the internet.)

Problem 1: The mouse can't double click to open anything. I have to right click and open things that way...

Problem 2: Tabs, like in browsers or msn, close when I click on them. And when I click the Back button, it opens another tab. Clicking a link also opens more tabs. When i click anywhere on the screen, a drag menu (So I can click and drag and it scrolls) appears.

This all happened after I uninstalled Yahoo! Toolbar, may that be the cause?

Go to start > Run... and type regsvr32 shell32.dll