This rarely happens but i found it annoying and i want to fix it (hopefully). Awhile ago I'm playing Red Alert 3 for about 45 minutes - 1 hour then i closed it, and immediately opened GPU-Z to check the Video Card status, temp, usage, fan speed, etc. Then my computer hangs, mouse and keyboard is not functioning, the screen freezes and my only option is to hard reset. I experienced this 2 times already. do you know what cause this? and how do i fix this? My Computer Spec's 0. OS: Windows 7 Ultimate 32bit 1. CPU - Intel G620 2. Motherboard: - Gigabyte H61M DS2 rev 2.1 3. RAM - 4GB 4. PowerColor HD 7750. ( updated driver ) GPU-Z Version: 0.6.7 Additional Info: When i restarted the computer and opened GPU-Z it gave me an error saying OpenCL is not detected or something, I re-Opened it and it went fined. thanks.