SCANLAB AG is a software developer for Windows.
It is reported that the following Windows processes are part of RTC 3, RTC 4: Real Time Scan-System Controllers:
If you want to remove RTC 3, RTC 4: Real Time Scan-System Controllers from your computer, just go to Start > Control Panel > Add/Remove programs and select RTC 3, RTC 4: Real Time Scan-System Controllers from the list of programs.