Windows 7 missing mpk.exe file

Windows 7 missing mpk.exe file

I am using windows 7 with eset6 and 3 user. I could not log in using one
standard user.When i trying windows Log on and Log off immediately.But
other user(admin user) is working fine. I scanned my pc eset found
following
Name: C:\Windows\SysWOW64\MPK\mpk.exe
Threat: a variant of Win32/KeyLogger.Refog.B application
Action: cleaned by deleting - quarantined
information: Event occurred during an attempt to run the file by the
application: C:\Windows\System32\winlogon.exe.
There is no file(C:\Windows\SysWOW64\MPK\mpk.exe) i found.
my question is to where i can found it and how to solve?