If you found Parallels HELM or previously called HELM4 not working after installed ASP .Net 3.5 Framework, and HELM Configuration Tool not working as well, you might use the following patches to fix the problem.
Please take note this patches only use for Parallel HELM 4.0 and 4.1 only.
If you have old version of HELM 4.0 (older than 4.0.20), please downlaod latest Helm Configuration Tool named HelmConfigurationTool.exe version 4.0.20(with Download section above), copy/replace it to ..\Helm4\Tools folder.
Launch the HELM_KB951847.Patch.exe command line tool on the affected server. If after this procedure Parallel Helm still not work, launch Configuration Tool and proform Helm update.