what is masetupcleaner.exe

The same problem occurred with mine, but after, when i uninstalled the Samsung kies.

New phone and the Smart Switch (replaced Kies for my phone) seemed to have done the trick. Had to use the back up function also and it worked perfectly. 

Cliff

Personally, having just downloaded the earlier version of 'KIES'

  for my mobile S5, I'd recommend 'Revo-Uninstaller' the 'PRO

  version ( it costs money but there is a free version ) ;

  'C Cleaner' is also good at cleaning the REGISTRY out,

  but events in early September 2017 ( malware found inside

  'C Cleaner' mean that none of these can be trusted 100% :

  I recommend using various 'non-autorun' Anti-Virus programs,

  as well as 'MSIE' ( which isn't particularly good at finding malware ).

Running Windows 7.  Uninstalled Kies yesterday.  Booted up Today and I was prompted to allow MASetupCleaner to run.  Found it in C:\Windows\SysWOW64 and removed it (shoot first ...).

Looking at the other files there with the names starting with MA, several had similar details copyrights ca. 2004, Korean language, and company details in Korean characters.  "MA" apparently stands for MarkAny, which is a digital rights management company.  It appears this is for combating music piracy and is associated with Samsung Kies.

I suspect that this was going to uninstall the MA software, and the fact that it was started after I rebooted was just a consequence of sloppy uninstall programming.  Of course I don't know that, it could have been installing something that would have remained resident on my machine after Kies was uninstalled.

My advice is to accept running MASetupcleaner from the popup

I refused running at the pop-up and the PC worked fine; I run MASetupcleaner manually from the directory where it is located and the PC worked fine as well (Windows 10)