What is a trojan(Virus)?

A trojan is a type of a virus which allows hacker to control another computer,read the person’s hard drive and acquire personal information such as passwords and bank account
details or worse, erase data from the hard disk.

What to do when you think you are under a virus attack

1.If you have an anti-virus do a full scan if not, then download an anti-virus like avast(free), or norton(paid)
2.Disconnect internet
3.Close all running programms
4.If the antivirus is able to remove all viruses then ok if not format your computer