watchdog.sys what is
WatchDog.sys is a vital system file used by the Microsoft DOS and operating systems, basically every Windows computer has this file, it contains codes for the hardware device drivers in your computer to execute properly, and that explains why WatchDog.sys error has such big impact over the system. Click Accessories System Tools System restore. 2  Click the option of â Restore My Computer to An Earlier Time â and click Next button. 3  Select a restore point which you believe is previous to the error happening and click Next button again.