|You can download an burn a Live CD to manage virus scanning.|
You can download Avira AntiVir Recue System ISO file and burn it to CD.
Avira AntiVir Recue System
Ariva AntiVir Rescue System ISO file
Then boot the laptop from this cd. When finished booting, click the update button first. Then click configure, the configure how to act on found infection.
Click the scan button and wait ....