I was having an issue with our PerfectForms On-Premise installation on a VMWare VM becoming unresponsive upon installation of the SSL certificate. I was able to reproduce the issue multiple times, with the same result.
After trying a number of different things, and researching VM hang issues, I found a Microsoft KB article (//support.microsoft.com/kb/2004121/en-us?p=1) which closely matched the issue I was having. It mentioned certain essential services such as GP Client, DNS, Etc would not start automatically because of a deadlock between Service Control Manager and HTTP.SYS.
Now for the fix
Boot Into SafeMode
Open Registry Editor
Navigate to HKLMCurrentControlSetServicesHTTP and create the following Multi-string value: DependOnService
Double click the new DependOnService value that you created
Enter CRYPTSVC in the Value Data field and click OK
Reboot Server in normal Mode
All is now well.
Environment: Windows 2008 Server R2 (VMWare Guest OS) running IIS 7, PerfectForms 2.0