First, run through Windows System Assessment Scan fails with Exit Code: 4 to test if this is a signing certificate issue
A workaround, if not a certificate issue, is to:
- Clone the Run System Assessment Scan on Windows Computers task
- In Advanced options, select Specific User under Run As section
- Enter the Altiris Application Identity username and password
- Click OK and then Save Changes
- The task should be able to complete successfully at this time