When I try troubleshoot my network problems I have an error. I run System configuration and it shows me when AVAST is running it makes this error. It started yesterday when I updeted AVAST.
Welcome to the forum.
Details would certainly be helpful. 
Hi. Since Avast update I can’t fix my network problems by only pressing troubleshoot. All I get is message - “A problem is preventing the troubleshooter from starting”. When I tried looking on microsoft page about my error, it says I should run msconfig to try to fix the problem by unclicking all programms except Microsoft services etc. I followed all instuctions and the end only one programm running while problem presists was AVAST.
Details please as Bob also have asked.
What os/sp?
What exact version of avast?
Do you (or did you) have other security (related) software installed?
What exactly is saying you have network problems?
etc. etc.
Keep in mind that we can’t see your system, so you will have to tell us what is going on before we can try to help you.