I am going to tell about how to delete virus like trojan, rootkit, malware, adware, spyware and all.
Here is a scanning tool name is HITMAN PRO. This is killer of virus and you can remove all virus from your computer but if this will get virus in MBR (Mast Boot Record) then it will delete that also and it this case may be window can be crash so be careful while scanning with Hitman Pro.
Step 1 :Download Hitman Pro Download link : Download Hitman pro and select System Type 32 or 64 bit and click on download and Run it.
And accept agreement license and install it and follow step and scan your computer.
After computer the scan and delete all infection and then restart your computer and now your computer is safe from virus.