How to delete viruses permanently from ur PC

How to delete viruses permanently from ur PC...if it is coming back again and again after deleting.......

Open the “Command Prompt” from “Start” menu or by shortcut key “Windows Logo + R”.
Type cmd in “Command Prompt” and hit Enter to open “Command Prompt” window.
Type the following command in Command Prompt to delte files
DEL /F /Q /A filename
here filename is the full address of your file e.g C:/Program Files/ABC/abc.txt
Here DEL is to delete the file specified, /F is the tag which helps in deleting the file forcefully, /Q is for quiet mode, so it won’t let the system to ask for your confirmation before deleting, /A tag help in deleting files with attributes like hidden files or so.

To delete the whole folder use following command
RD /S /Q folder path
here folder path is the full path to the folder you want to delete e.g C:/Program Files/ABC
Here RD is for Remove Directory, /S for removing all the sub-folders and files present in that folder, /Q for quiet mode that it will not ask for your confirmation before deleting

You can use the same method to remove any file or folder, but this method provides great help in deleting infected files in folders.