I have got many problems on my dual-boot ubuntu 11.10. Unity interface always changes from 3D to 2D automatically, when I try to create login password it does not accept my root password, the look of folders always changes automatically,I'm always getting problems with repositories, update manager isn't working, software center doesn't find any internet connection while it actually exists , cannot minimize Google Chrome while I'm working with other applications, and so on.

I actually can't spend several hours on forums to fix that issues because I do not have much time for that. I want somewhat like easy way, by which you can store ALL settings (passwords, unity and so on) to its factory default settings.

Is there such a command or something like that to resolve this?