How do you know when you computer has a virus?

Answer 1

Here are a few primary indicators that your computer might be infected:

• Your computer runs more slowly than normal

• Your computer stops responding or locks up often

• Your computer crashes and restarts every few minutes

• Your computer restarts on its own and then fails to run normally

• Applications on your computer don't work correctly

• Disks or disk drives are inaccessible

• You can't print correctly

• You see unusual error messages

• You see distorted menus and dialog boxes

Answer 2

First and for most, get a virus protection application. AVG is free, get Ad-Aware, also free. Then a firewall, sygate a has a free version as well. Protect your computer. Secondly, your computer will start to run slowly and freeze more often. It may even resart or just close applications for no reason. If your computer is acting strangley in any way it could have spyware or a virus.

I cannot stress enough, do not let you computer be unprotected. I am not saying you not already doing this. I just want to make sure you have these safe measures installed.

Answer 3

It depends.

Some viruses give obvious hints: files disappear, options on some programs are disabled, windows pop up from nowhere. But others are silent, like keyloggers (read all you type, then send away to somewhere), and zombies (do remote-controlled dirty work, without knowledge of the user).

Best way to know is: get an antivirus program, install and run it; the antivirus will show you, and, in most cases, will be able to kill the virus.

Answer 4

What your computer does with a virus would highly depend on the kind/type of virus it has. Chances are if it's doing something out of the ordinary. It's got some kind of bug in it.

Answer 5

The best way to find out is to run a virus check. There are several available on line for free.

Try this one from major antivirus company Trend Micro: http://housecall.trendmicro.com/

Answer 6

If your computer has slowed down a fair amount since you got it, chances are you have a virus, or viruses. If you are having trouble getting onto certain sites, or if things just do not work very smoothly.

Answer 7

It runs funny and freezes up crashes if you have a virus you can usually use a scanning program to idendify a trogan virus or etc.

Answer 8

When the computer getting problem…like computer is slow or hangs or some unwanted things appears on the monitor…

Answer 9

very slow and erratic! Or programs hanging, or files getting corrupt or go missing! Or the system reboots by itself etc

Micro Trend, its a free ONLINE virus scanner , click on the link to scan your pc on this page:
http://housecall.trendmicro.com/

or Panda AntiVirus Free Online scan
http://www.pandasoftware.com/products/ActiveScan.htm

or Kapersky AntiVirus Free Online Scan
http://www.kaspersky.com/virusscanner

PS there are very many free online scanners, if you choose this option go for a well known one!

AVAST a FREE anti-virus product get it from here :
http://www.avast.com/eng/avast_4_home.html
(The home edition is the free one)

AVG another good free antivirus, get it from here:
http://free.grisoft.com/freeweb.php/doc/2/

Use lavasoft and Spybot Search and Destroy (both great FREE trojan hunters), Lavasoft from here

http://www.lavasoft.com/
(its the lavasoft adaware se edition thats free)

and Spybot from here
http://www.spybot.info/en/index.html
(click on the download link on the left)

Download your trojan hunters/anti virus of choice and run a full system scan! Personally I have antivirus and both lavasoft adaware and spybot, between the three of them Im fairly safe!

Answer 10

it could lock up on you - it could slow way down - it could hijack your home page and take over, etc. There are a few free virus scans out there - www.trendmicro.com and www.grisoft.com