What does it mean by computer viruses and by whom and when this virus introduced produced?

You need to run these 5 essential steps to remove all the spyware on your computer.

1. Run Deckard's System Scanner (DSS)

2. Run Malwarebytes Anti-Malware

3. Run the anti spyware removal programs spybot

4 Run Superantispyware

5. Run a complete scan with free curing utility Dr.Web CureIt!

Install threat fire which will enhance your antivirus protection