Photo03.scr is a malicious Trojan horse which comes into your computer without your permission and notice. It usually comes with spam email attachment, freeware and malicious links from the internet. It will change your registries entries and inject its malicious files onto your computer. It will change your computer setting and the startup setting. As soon as you start your computer, it will run itself automatically at the background. It will slow down your PC performance by taking up a lot of system resources.
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