Remove malicious software from your computer using an emergency system or formatting
A more expensive, but foolproof solution is emergency software like the Kaspersky Rescue Disk, the F-Secure Rescue CD, or KNOPPIX. The programs can be downloaded for free and copied as a bootable ISO format on a removable storage device. Before your computer starts up, the emergency software performs a malware check and removes anything dangerous. If your computer is very badly affected by malware, it won’t even start so these emergency systems are the only solution to get your computer back up and running.
If the computer is still experiencing problems that can be traced back to malware, you have two options: you can either contact an expert for their help, or you can continue to tackle the problem yourself by backing up your personal files, formatting all hard drives, and re-installing the operating system. Formatting is definitely the most complex approach in combatting malware, but it’s also the most secure method since some viruses plant themselves deep in the system or install other malware which might not have been picked up during the scan.