|Run this, we need to find if a nastie altered your settings.|
Tweaking.com - Windows Repair
Disable your antivirus program before running Windows Repair.
Start at Step 1 & when you get to the final step, check/tick all the boxes. Reboot when finished.
Copy and Paste the contents of the following log in your reply:
C:\Program Files\Tweaking.com\Windows Repair (All in One)\Tweaking.com_Windows_Repair_Logs\_Windows_Repair_Log.txt