Topic update: After the latest CCleaner version release (6.11.10455) the situation is slightly changed. CCleaner no longer crashes or freezes when running the Driver updater option. Backup of the old driver version starts and shows 100% complete after a few seconds. From there on nothing happens anymore. The 100% backup status remains to be shown; driver is NOT updated. Other menu options of CCleaner can be activated and seem to work as normal. When checking Driver updater again it still shows the 100% backup status, but no further progress is made.