Hi, my computer is suffering from a rootkit MBR.\\PHYSICALDRIVE0\Partition4. It is a Dell with running security software like Malwarebytes Anti-Malware and Avast Anti-Virus. Both of these programs are telling me that a rootkit is present on the computer. Actually, Avast was able to locate the exact location, while MBAM shows only alert. When I try to clean MBR.\\PHYSICALDRIVE0\Partition4 with Avast, it detects similar files at around 30 in existence. First, it tries to fix, then quarantine. However, Avast ended up deleting the virus. I thought that it took care of everything, but after a restart, the PC is still infected. Could it be because my Avast is a free version? How can I delete MBR.\\PHYSICALDRIVE0\Partition4 completely?
Right now, I am using a tablet to post my present situation. My Dell PC is unusable. It frequently freezes. I was thinking of reformatting the computer though a little bit hesitant because I wanted to find some easy ways to deal with the problem. What should I do?