Yes, thanks I do appreciate all the input. We did test disabling and removing security software & firewall - just standard Microsoft Security Essentials & Windows Firewall. And to reiterate incase it wasn't clear, when I switch the File|Open dialog to Windows Standard, it works fine. It's only the Mastercam X style that is freezing up.

Thanks for all the replies I will attempt both. Just wanted to repeat though, this is a single PC, that while connected to the internet is not sharing or using any resources with other PCs on the small workgroup here. Also, I did create a new Windows user profile and had the same freeze, so I don't thing the config folder, which appears to be a per-user item, would make a difference. Thanks again, still trying to figure this out.

Thanks! The default open directory is local and within my user profile, full permissions and such. As for the config file, can you elaborate on that? What would we lose by removing the file? How much of the customization we've made? If I backup the original and remove/re-build a new one, can I restore the old one back? Can you let me know which file I'm actually looking for? Sorry for the all the questions and thanks again.

Hi, when we're using the default Mastercam X Style File|Open dialog, the program freezes as soon as we try to do a File|Open or use the Open icon on the toolbar. .Net has been removed and reinstalled, various utilities have been run looking for the issue. We've tried a new Windows user profile but the issue persists. Any suggestions? Thanks!