Farbar Recovery Scan Tool is a portable freeware that helps diagnose malware issues. It is also possible to run FRST in the Windows Recovery Environment in order to diagnose and fix boot issues.

This program will display detailed information about the Windows Registry loading points, services, driver services, Netsvcs entries, known DLLs, drives, and partition specifications. It will also list some important system files that could be patched by malware.

Also take a look at Farbar Service Scanner.