The following warning applies to any workaround that suggests changing a registry entry.
Editing the registry incorrectly can cause serious problems that might require you to reinstall your operating system. Citrix cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. Be sure to back up the registry before you edit it.
The XenApp and XenDesktop 7.18 release contains the following issues:
"StoreFront cannot be upgraded because the following program is using some files. Close the program and try again.
Program name: CompatTelRunner"
To work around this issue, follow the instruction in the message. [#DNA-51341]
Value: 4 [#HDX-10055]
As a workaround, disable LogonUISuppression. [#HDX-11413, #HDX-12465]
Components and features that are documented separately have their own known issues articles.