Yoshhhhh..then i think... your hardware Ws-tvu20b2-Usb2-0-Analog-TV-Boxis not match with your computer system. thats all..maybe you must upgrade your system..like RAM and maybe CPU. This situation is like... i give example...let say about Avira (antivirus). Sometimes has computer will automatically restarted when istalled avira..when you on your computer again..it will restarted again. try this if you want know=When your computer reboot again,open OS safe mode system ..then tell me if your computer restarted again or not...