Here are the instructions for how to get that folder to delete.
Run CMD application as administrator
Type the following… RD “C:\vaultname” /s
Press Enter
Replace the vault name. The section between the quotations should be the full file path.
Then reboot the computer.
You may also need to delete the following lines in the registry.
To do that, click the windows start button, then search for regedit
That will bring up the registry. Then you can delete the following lines.
HKEY_CURRENT_USER\Software\SolidWorks\Applications\PDMWorks Enterprise\Vaults\[VAULTNAME]
HKEY_LOCAL_MACHINE\SOFTWARE\SolidWorks\Applications\PDMWorks Enterprise\Databases\[VAULTNAME] and also on a 64-bit Operating System:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\SolidWorks\Applications\PDMWorks VAULTNAME