Which is used by the SolidWorks Installation Manager during the update. A WI error codes reference can be found on the Microsoft website. You may not notice there would still be leftovers of SolidWorks Installation Manager, for example, some read-only files automatically kept by the system or its registry entries, staying right in your drive, even if.
(“X” stands for the hard drive you install SolidWorks Installation Manager on.) How to delete SolidWorks Installation Manager.