This can be caused by Hard Disk or Registry corruption, so I wish to rule this out first please.
do the following please
Download CC Cleaner (free) from hereCC Cleaner
(Click Download Latest Version on the top right)
Run it and let it scan and repair your registry.
Once done, restart the computer
Click Start, run, type in CMD and press enter
A black window will open.
Type in it
press enter and when it has completed, type in
It will complain the Volume is in use and to run on restart. Say YES and restart the computer
Than test if you have the problem and let me know please.