hello everyone! 

                   iam in great trouble  ,because in my  computer there are trojans.i have avg antivirus.it detected the trojan 2 months ago.then i moved  ithe infected to virus vault in avg .then  i downloaded avast antivirus.it detected another trojan  and i deleted it.my computer is very slow due to these  trojans.in avg virus vault it is shown with red marks which means it is unable to heal it.can i delete it.my friends are saying that if i delete it, the no. of trojans will increase.is it better to format the computer.my computer have 1 gb ram.if i format my computer will it have the same speed as now or will it have high speed as earlier ie.speed before being infected.please give your valuable suggestions.iam very much depressed .my computer is a new one................