Issue

Vulnerability scanner (vulscan) is hanging with the message "Checking for other instances of scanner or software distribution agent".

Cause

The vulnerability scanner cannot run while another instance of the vulnerability scanner is running.

The vulnerability scanner cannot run while another instance of the software distribution agent (SDCLIENT) is running.

Resolution

Check to see if the running Vulnerability scan is stuck, or if it is currently doing something.

You can check the log files in C:\ProgramData\LANDESK\Log to see what is currently occurring.   Sort by date and time so that the newest is on top and look at the latest logs.

Vulscan is responsible for several activities.  A currently running log will typically be called vulscan.PID_XXXX.log (Where the PID stands for the Process ID of the running Vulscan process)

In addition if an SDCLIENT process is running the vulnerability scanner will wait for it to finish or eventually it will time out waiting for it.   Check if there is an SDCLIENT process running.

Verify that the SDCLIENT process is doing something, if it is not you can likely End Task in task manager to allow Vulscan to proceed.