Unusual computer issue?

I was rendering two videos in Sony Vegas Pro 11, but during the rendering my Windows 7 computer got a System Service Exception it appears to be. The screen was freezing, and I saw small purple pixels coming out randomly and disappearing. I thought it was unusual, so then I unplugged my computer and plugged it back... show more I was rendering two videos in Sony Vegas Pro 11, but during the rendering my Windows 7 computer got a System Service Exception it appears to be. The screen was freezing, and I saw small purple pixels coming out randomly and disappearing. I thought it was unusual, so then I unplugged my computer and plugged it back in. I turned the power on, and I hear the computer starting but the monitor won't give me a screen. I feel this has something to do with the System Service Exception, and what am I supposed to do? I did this process multiple times, but nothing happened.
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