The June 2022 Windows update (KB5004442) changes how DCOM server security works. As such, some older versions of Liberty 3, 4 or 5 may need a Netcall software upgrade (if you have not been keeping your Netcall software up to date), or some configuration changes by your IT team on your servers (if you run your own VMs or on site hardware) to continuing operation correctly. We have added a Windows update KB5004442 technical bulletin here which will give you all the details of which Netcall Liberty version are affected and what you need to do next. Please take 10 minutes to have a read, or pass this onto your own IT teams for review.