The process cannot access the file because it is being used by another process. (exception from HRESULT: 0x80070020) Plesk control panel unable to start

Cause

Another service is listening to TCP port 8880 or 8443.

Connect to the server via RDP

Find the process ID from the service listening to ports 8880 or 8443:

netstat -aon | findstr -i “:8880 :8443” | find “LISTENING”
TCP 0.0.0.0:8880 0.0.0.0:0 LISTENING 2476
TCP 0.0.0.0:8443 0.0.0.0:0 LISTENING 2476

Obtain more details with the PID:

tasklist /fi “PID eq 2476“
Image Name PID Session Name Session# Mem Usage
========================= ======== ================ =========== ============
httpd.exe 2476 Services 0 16.708 K

Kill the process: taskkill /F /PID 2476

Start plesk control panel in IIS.