Cursor won't stop jumping when trying to type.?

This has happened before which I did nothing about because it stopped by itself however now it is getting on my last nerve because it is back. This only happens when I am using the browser. I currently use Chrome and have no intention of changing. When I type in the top "http" bar of the window a "?" question mark will appear then every time I type, my words will highlight and type over themselves.(Not even letting me type the full address/link in). When I type in Google or any other website the cursor automatically moves to the top "http" bar. I end up having to click the area I want to type in for every letter I type which is ridicules. At the moment nothing is happening it will randomly attack usually when I first open the browser or at random times when you think it has stopped. I have tried to uninstall Chrome a few times clearly that has not worked. When this started happening something else went dodgy too which is really irritating. The search window in my computer will randomly pop up on screen. I would click it away then seconds later it would appear again. What the hell is going on seriously? I have looked up about it all and all I could find was something to do with mouses with tiny, hidden buttons that can activate them. Help! >.<