The error message "XceedZip.dll cannot be deleted (error 32)." is given when installing SyncBack
This error is given because either SyncBack is still running, or another program is using the xceedzip.dll file that is used by SyncBack. Check to make sure that SyncBack is not running, e.g. by using the Task Manager in Windows. Also, some other programs, e.g. EMail2DB, may also be using the DLL. Close those programs and try installing again. If that still fails reboot and try again.