Read the instructions, download and burn (maybe from another computer), finally use one of this rescue CD’s:
- G Data BootCD
- Dr. Web
- Avira
- BitDefender
- Kaspersky
- F-Secure
- Vba32 Rescue
You can check also this comparison article.
Integrate Multiple Antivirus Rescue Disk into One Single Disc or USB Flash Drive with SARDU. The most compreensive cleaning CD.