Hey After running the 3rd part program "Advanced Systemcare" i get te message "BTTray Unable to start bluetooth stack service". It happen after evry reboot and becauce of that bluetooth dont work. I`m 100% sure it happend after running this program. I have google the problem, and its related to corrupt value in the registry. But i cant fix it. I tried reinstall bluetooth drivers, and tried to cleen up whit Registry Mechanic and Ccleaner, but nu luck.. I dont have a restore point for advanced systemcare I`m on w7, x64.