A lot of top antivirus providers offer a free bootable recovery disk that can be used to clean your computer after it has been infected. These are basically Linux-based tools designed to disinfect an infected computer that doesn’t start up or can’t be scan with a standard antivirus program running in Windows. I would recommend the Kaspersky disc for its simplicity of use (though it may not work with certain Dell systems).
You can also find similar features with the Avira or ESET rescue disks, which feature an interface with a graphic design, but require the use of a USB/CD device to start. Both of these options will identify and scan for malware on your PC, but their virus definitions aren’t up-to-date as frequently as Linux-based rescue disks.
The Trend Micro rescue disk is another great option and one of the smallest on this list with a size of around 70MB. It doesn’t feature a graphical user interface but it works quickly and offers a few options for customization. This includes the capability to mount and scan specific volume volumes, files and even individual folders.
The Comodo Rescue Disk is a viable option for a virus check, however it doesn’t have the same flexibility as Linux-based options. It is however a very effective tool for detecting and deleting the kinds of viruses that can hide in Windows files to thwart detection by antivirus programs that are normally used. You can choose between the option of a text-only or full graphical interface as well as the option to run a custom or smart scan.