Onsulake

There was an icon on my desktop that had the letter A and a green rectangle attached to it. I clicked on it, and nothing happened. Now it is a D with an orange rectangle next to it. It still doesn't do anything and I don't know what it is. I've googled it, but haven't found anything about it.

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If you are so worried, do a full system scan with your antivirus program. It could take a whole hour but better safe than sorry. I do a full system scan everytime I think something fishy is going on. Also check out the sources because it already talks about the "FormMain_Pmonitor" that you are asking about. However, I cannot guarantee the legitimacy of jsbenifica's site. Like I said, do the full system scan and should be more relaxed afterwards.

henowhorway

Yeah man, it's a virus. To get rid of it search "CMD" in the start menu. And click on it. You should see your computer name, and a _ next to it. This is for DOS-Commands. Type in "format" and hit enter. This will bring you to a page that shows every program you have. Look for something suspicious (A.K.A FormMain_Pmonitor) and delete it. That's how you get rid of viruses.