1) Registry cleaners CAUSE problems, they don't cure them.
2) Drivers have nothing to do with your problem. Either a piece of hardware is failing, an app is conflicting, or your registry cleaner screwed up something.
First let's find out if the reboot is caused by a blue screen error. Download BlueScreenView:
http://www.nirsoft.net/utils/blue_screen_view.htmlunzip downloaded file and double click on BlueScreenView.exe to run the program.
when scanning is done, go to EDIT - Select All
Go to FILE - SAVE Selected Items, and save the report as BSOD.txt
Open BSOD.txt in Notepad, copy all of the content, and paste it into your next reply
Next, you can boot to safe mode and see if the system runs smoothly or if there is still a problem there.
Then you can run diagnostics on all hardware components (ram, hd, etc).