Uninstall all the SolidWorks that exists on the system ( insist of Disk C :/ Document or Windows or Program Files )
Install and Run [ Wise Registry - Clean Master ]
Run Diskcleanup
Windows } Run} Regedit
HKEYLOCALMACHINE }Software }Wow6432Node\SolidWorks (Rename Solidworks to Solidworks_old) or you can delete this folder for sure
Delete Solidworks folder in registry
reg DELETE HKEY_LOCAL_MACHINE\Software\SolidWorks
reg DELETE HKEY_CURRENT_USER\Software\Solidworks
Reinstall Solidworks and you can fix the error . Software could be installed now