There were many browser hijackers that try to break into my computer, but this time there is this fake desktop background that suddenly appears. I really don’t know what sites I went to, but this certainly looks like a very dangerous virus or Malware.

This background reads “WARNING! YOUR’RE IN DANGER! YOUR COMPUTER IS INFECTED WITH SPYWARE!”

At that time, I tried to clean and scan my hard drives using my current antivirus program, but it says that my current antivirus program has failed and forces me to purchase their malware.

I tried rebooting my computer but the background is still there and obviously the virus or malware is still present in my computer.

Hi!

I have some knowledge about viruses but i don't know their activities. Which virus does what kind of problems to the PC ? Does anyone have any idea about the latest viruses? What can those virus do?

Some example will help us to identify which are the most dangerous. Recently I have experienced some attack of Sality or Trojan virus. Those viruses looked very dangerous to me and they  destroyed the system file and crashed the whole system.

Latest Antvirus is required to defend against those. I want to know about more viruses which can damage the whole system. Please tell me which is the worst virus for the system. I will be glad to know about it.

Can any one help me?

My AVG detected Trojan. Byte and verified infection in the Java cache directory and advise me to perform an update to remove it. However I don’t have Internet access. I am afraid to continue using the computer because it might cause further infection. Please help!