Deleting Viruses Manually:My Experience

  The other day I was trying this on my pen drive.To my consternation I found an autorun.inf file and another named qawsx.exe.The second file got me suspicious.
  These files remained even after multiple scans using my anti-virus software.I noticed that these files were created when a usb drive was plugged to my pc.
  That told me two things:
 1.A running process was copying these files to the usb drive.
 2.My usual anti-virus and anti-malware software were not detecting this malware.
  I uploaded the file to virustotal.com for further analysis.The result indicted that only 4 software indicated that this was malware.A google search indicated that Prevx would remove this malware;this was also one of the softwares that detected malware in the virsustotal result.
  I downloaded Prevx and scanned.It gave me the location of the malware but would not remove it without me purchasing the license. The malware was present in a hidden folder in the system partition alongside system files.
  I simply deleted the file using my method.This was successful as a another scan using Prevx indicated that the malware was not present anymore.