Could this be because of the deletion of those files from the location System Volume Information\...\A52078.exe? and I know that I asked this question already but I need a second opinion as to whether I should do a clean instal of my OS?
why...as said it is not virus
The process MaxBackServiceInt Module belongs to the software Maxtor Backup or Maxtor OneTouch III or MaxBackServiceInt Module or Seagate Manager Installer by Seagate.

Description: File MaxBackServiceInt.exe is located in a subfolder of “C:\Program Files”. Known file sizes on Windows 7/XP are 184,320 bytes (93% of all occurrence), 177,448 bytes.
The program is not visible. MaxBackServiceInt.exe is not a Windows system file. The program has no file description. You can uninstall this program in the control panel. MaxBackServiceInt.exe is able to record inputs. Therefore the technical security rating is 30% dangerous, however also read the users reviews.
If you are having problems with MaxBackServiceInt.exe, you can completely remove Maxtor Backup or Maxtor OneTouch III (Control Panel⇒Add/Remove programs).


so i guess that reason why it is detected as PUP
PUP (potentially unwanted program) http://searchsecurity.techtarget.com/definition/PUP

Maxtor is now seagat http://www.maxtor.com/home-en-us.html

Seagate http://www.seagate.com/www/en-us/