Recently I had used my pen drive at a net cafe, came back home and used the same on my Personal computer. Oops the next moment it was infected with virus. I had to delete all my software’s from my machine, format the hard disk and re-install the OS. This entire thing took more than 6 hours and I lost all my valuable softwares. So we must be very careful with viruses, spyware, adware and hackers. We must install good antivirus softwares so that we can protect from the viruses. There are many Antivirus software which you can get for free. So you should try to install a antivirus software very soon if you don’t have one. You need to install antivirus, firewall and anti-spyware softwares. If your system is infected with virus some antivirus software will offer to delete the file, others will save it a virus vault so that the virus cannot attack other files on the PC, while others clean the file if it is cleanable. So download some free antivirus software and install in your machine.