How viruses work
This post is the second part of a series of posts on how to manually remove a malware from your computer.
There are now lots of other malware which we usually call viruses. Real viruses must infect (copy themselves into other files on the computer). If they don't, they cannot merit the name 'virus'. Malware always have an action (payload) which they are executing now or at a later time.
Real virus coders seem to be getting extinct - this is not a challenge to them, but an encouragement for you that you can get through a malware attack. Malware on getting on your system usually try to hide themselves to avoid detection (some only too well that an up-to_date antivirus cannot detect them as malware). Whatever task they have to do, they do it in time while hiding themselves. An antivirus monitors some activities that programs carry out and use signatures and heuristics to find malicious code. You can read on how to know if you have a virus for more signs of malware.
In hiding themselves, some malware disable the task manager, registry editing, folder options, system restore, run dialog and/or command prompt. We may want to use these tools in removing them so it may be a wise option for the malware to disable them.
This is all I'll say for now (@ AmNotGoogle).
Other posts in the series