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How to remove viruses and Trojans to hand

Sometimes slips something on the computer and do not know how to remove it, what do we do? "We mounted a trojan remover program? Which? Would not be another Trojan disguise? Does the computer can execute so many things at once?

The best solution is to remove it by hand, but of course it is somewhat difficult, in this post I will give some guidelines as can be done in two steps:

STEP 1) is pressed CTRL-ALT-DEL and look for the unwanted item between processors, and choose the process with the mouse and marked END PROCESS TREE or End Process. Here is everything that is running at any given time, we can safely delete everything, what happens is that everything that we remove remove a program from memory, no problem: Restarting the computer returns. Those who can not be removed are usually SYSTEM: svchost.exe, winlogon.exe, services.exe, System, System Idle Process, explorer.exe and some similar

STEP 2) Go to Start - Run - regedit.exe Here we look for these keys

Machine Run key: HKEY_LOCAL_MACHINE \\ SOFTWARE \\ Microsoft \\ Windows \\ CurrentVersion \\ Run Key Run
User: CHKEY_CURRENT_USER \\ Software \\ Microsoft \\ Windows \\ CurrentVersion \\ Run
They are the programs that start when the computer starts, here they get viruses and Trojans and more that start at the beginning and are not required to Be here.
line will remove unwanted and dangerous if it is something executable eliminated before telling us the hard disk.
Here we can relate the name of each in the directory where it is and thus be able to locate it in paragraph STEP 1) We can go to the directory to see what's what.
what must be around here in a clean computer? The Run Key
User: almost nothing, a virus as much but usually on the other side (I I have nothing here)
Run key in the machine: anti-virus, firewall (if any), any special driver specific to a little standard equipment we have and nothing else (I have more stuff antivirus and 3)
All normalitos we can start programs by hand SHOULD NOT be around here, is started by hand and now this.

Any questions? I suppose that many go ahead with the comments ...