When creating new virtual private servers most default components are already installed, but when you want to add extra windows components (add/remove software -> windows components), you bump into this error:
Setup library wssoc.dll could not be loaded, or function StorageServerSetupProc could not be found.
The specific error code is 0x7e.
There is currently no fix available for this, it will be solved in Virtuozzo 4.0.
You can however fix this yourself by creating a new custom application template, using the virtuozzo template creation wizard. Choose to create a template from manually selected data, be sure to have created a temporary VPS already, you'll need to enter the vps id, and desired template name.
When prompted which files you want to include, add these:
Finish the wizard, then run the command "vzpkgdeploy -i <templatename>" to enable this template.