Do a System Restore, use a restore point dated prior to this problem.
Click/tap on the Search, then type in restore point.
Create a restore point will appear below, click/tap on it.
Click/tap on System Restore
In the next window that opens click on Next and follow the prompts.
system restore3.PNG 21.1KB
You will want to choose a restore point prior to your current problem.
If you need more restore point options there is an arrow in the Date and Time box which when you click/tap on it more restore points will appear. Restore point options will change each time you click/tap the arrow. When the arrow changes from a down arrow to a up arrow you will have reached the end of the restore point options.