Most installation failures come from insufficient permissions, low disk space or conflicts with other security software. Work through the checks below in order.
Common causes
Make sure the installer runs as administrator and that the system drive has enough free space.
- Not running as administrator
- Not enough disk space
- Incomplete installer download
Further steps
If driver loading fails, remove other security products, reboot and install again.
- Retry after uninstalling other security software
- Temporarily disable third-party firewalls
- Try the offline installer
FAQ
It says a file is in use. What now?
Reboot and run the installer immediately, before other programs can lock the folder.
The installer checksum failed.
Download again from the official source and compare it with the checksum on the download page.