the updater doesent install the downloaded signatures

i updated CIS to the latest version and after that the computer crashed two times. then it run ok for two days. yesterday it crashed again so i decided to restore windows and choose the system restoration point from before updating CIS. now the computer runs, but after updating CIS again in will download the new signatures but fails to install them.

i followed those instructions:
“Please go to ProgramData/Comodo/Cis/wpTemp in this folder you should find all the downloaded base files”
and after deleting them the database was updated.