When use computer use windows 7 or upper, we can get some error, like: cannot use mouse, keyboard, cannot connect to internet, wifi error ...
I have a special method to fix them, very easy:
Step 1: Go to control panel -> Hardware and Sound -> Device Manager
Step 2: Choose the error device, and choose Uninstall.
Step 3: Restart your computer.
In the next time you start your computer, Windows will automatic install all of missing driver.
And everything is like new.
Hehe, hope it help. Goodluck.
--Tuấn Vũ--
