Signs of a virus infection on your computer

Pop-up windows — especially those that occur frequently and unexpectedly — can be indicative of malicious software installed on your computer.
Your online bank account has mysterious withdrawals.
Some of your settings have changed without your intervention.
Your laptop slows down.
You’re randomly connected to various websites.
The computer stops responding, or it locks up frequently.
The computer crashes, and then it restarts every few minutes.
The computer restarts on its own. Additionally, the computer does not run as usual.
Applications on the computer do not work correctly.
Disks or disk drives are inaccessible.
You see unusual error messages.
Anti-Spyware stops listing Spywares even though you believe that your pc has been infected.
Your security software is disabled for no reason. Additionally, the antivirus program cannot be restarted.
Your security software cannot be installed on the computer, or the antivirus program will not run.
New icons appear on the desktop that you did not put there, or the icons are not associated with any recently installed programs.

Viruses can cause a lot of problems, from blocking access to your computer to actually causing data loss. It is very important that you have a very good security software installed that will protect the health of your computer and your data. Some virus removal processes can be very complex. If your computer got infected with a virus you should take it to a specialist computer shop if you are not sure how to remove the viruses from your computer.

How to prevent your laptop from getting infected :

ALWAYS use a very good security software.
Be very careful what you download from the internet and use common sense when surfing and be aware of pop-ups
Avoid downloading data from different storage media e.g: usb stick, especially if you have been using it on a computer at an internet cafe.
Avoid opening or downloading attachments from emails that you have received but you don`t know who sent them