First of all I'm a very happy user of the PRTG Monitor software for many years. I've had my share of challenges, but so far have always been able to find a solution. However my current problem has got me completely stumped.
I'm using PRTG Server (latest version) on a dedicated Windows 10 machine, not part of a domain or workgroup. This server has 1 local probe, which monitors 3 other Windows machines (one 7, two 10) and some linux boxes. I have set up everything according to the helpful manuals (getting wmi to work in a non-domain environment was tricky) and everything has been working without real problems for many years.
Now a few days ago, after an update of Windows 10 of one the client machines, the WMI sensors no longer work for that machine, and I cannot figure out why (I've spent already several days troubleshooting). It seems the connection is just timing out (as 'check now' on a sensor does not give any update for quite a while)
I can see it's due to the windows update, as the wmi sensors stop recording around the time of the update, and the error i get now is 'cannot establish connection'. Interesting to note is that the WMI sensors of another windows 10 machine (also updated) are working fine. (Not necessarily related, but also the SNMP sensors stopped working. I found out that the update had reset the IP addresses SNMP was accepting requests from to 'localhost' and this removing the PRTG server IP)
Things I tried (in addition to going over and checking every step of the manual and kb) - retype the windows credentials in PTRG for this machine - disable any kind of firewall on the client machine - repair/rebuild the WMI installation - run wbemtest with the admin user specified in PTRG -> works fine, no problems - tried PTRG WMI Tester with the admin user specified in PTRG -> works fine, no problems
Does anyone have an idea how I can troubleshoot this issue further?
Thank you very much in advance.