I think, your computer is badly infected from the viruses and malwares, spywares.
You can follow these troubleshooting steps:

1. Scan your computer by using any updated antivirus program.
2. Try to install and download the "Antimalwarebytes" (freely available)
3. Try to update "Antimalwarebytes".
4. Scan your computer using the "Antimalwarebytes".
5. Follow the same procedure for "Superantispyware" as you done for "Antimalwarebytes".
6. Delete all the internet temproray files.
7. remov all the unwanted startups by using msconfig.