Read the instructions, download and burn (maybe from another computer), finally use one of this rescue CD’s:

  1. G Data BootCD
  2. Dr. Web
  3. Avira
  4. BitDefender
  5. Kaspersky
  6. F-Secure
  7. 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.