Keyboard Not Functioning In Browsers

1. Keys do not work in Any of Internet Browsers. Even on-screen keyboard does not work.
2. Every time I double click a file, A pop-up "Do you want xyz to make changes to the computer ?" is welcoming me!
3. I click on any of the icons in the task-bar and a new window is opening. For example, If I click on the firefox icon pinned at the bottom, Every instance I click it, a new window is opening
4. I am not able to open a folder by double click. I can only open it by right click and then Open
5. None of the keys and keyboard shorcuts seem to work. But that is not the problem with keyboard because, I am able to type words in Wordpad and Notepad

I formatted my Windows 8 twice and still these problems are there.

Even if I restart it, things work fine for 5 min and then the problem would be back.