An easy way to know the computer has detected a virus

Viruses are computer programs that can spread itself. The virus has no destructive capability, but some are just ordinary course: will show off his existence. But all essentially the same virus, disrupt the performance of the computer. And worse, the virus sometimes and even often in action when we are need-quickness of data or else there is an urgent need
Before having any further damage and the virus spread to a variety of data files and various media that we / our friends have, should the virus be handled..
There are some easy ways to know whether the virus has invaded our computers or not
1. whether drastically decreased computer performance, or whether at certain times when we do not do anything but the computer suddenly stops (hangs)
 See if the folder should exist on the hard drive / flash is concealed (hidden) or deleted by the virus (eg a file with an. LNK, or. EXE)
3. Appears files looks strange / is not made your
4. It comes after the process is stopped, but a few moments later reappeared. (just look through the Windows Task Manager by pressing the CRL + ALT + DEL)
5. You can not change the settings windows
If your computer was attacked by a virus, immediately do the repair by checking using the Anti-Virus with the latest data (update) or reinstall windows. but please remember, when you re-install windows

delete windows system files first. It is intended that your computer is not infected with the virus originating from the files that exist on the previous system. At the time windows before deleting the file system, perform by using the quick format, do not use the usual format, for your hard drive can be more durable