housecallx process running in background after deletion

Hi, I run a scan with Trend Micro Housecall, the free tool without installation.

After the scan I deleted the executable and found the logs, updates and other folders inside appdata/local/temp.

I run CCleaner to delete the temp files but one folder in particular remained present. I tried manually deleted it but it say a program was in use.

In the task manager I found the process HouseCallX running in background with a cpu utilisation from 2 to 13%, even after I had closed the HouseCall software and deleted it like 5 minutes before.

I force close the process and then I succeeded in erasing the temp folder.

Is this normal? I thought it was an on demand scanner, why it continued to run in the background?

Thanks