ESET PROTECT users: Perform these steps in ESET PROTECT On-Prem
Verify that your internet connection is active by visiting the ESET website.
Press the F5 key to open Advanced Setup.
Click Update and expand Basic. Click Clear next to Clear update cache and click OK.
If the issue is still not resolved, continue to part II.
Press the F5 key to open Advanced setup.
Click Detection Engine → HIPS and expand Basic.
Click the toggle next to Enable HIPS to disable it and click OK to exit Advanced setup.
Bookmark this page (for example, press CTRL + D or click the star icon next to the address bar in your web browser) for reference after restarting your computer. Restart your computer.
Confirm that you can see hidden files, folders and drives:
Delete the contents of the Updfiles folder and the Charon folder.
C:/ProgramData/ESET/ESET Security/Updfiles or
ESET Endpoint Antivirus/Updfiles and delete the contents.
C:/ProgramData/ESET/ESET Security or
ESET Endpoint Antivirus/Charon and delete the contents.
C:/Program Files/ESET/ESET Security/Modules or
C:/ProgramFiles/ESET/ESET Endpoint Antivirus/Modules and delete the em0** folders (some folders may not delete). Restart your computer.
Re-enable HIPS and HIPS Self-Defense (see steps 1-4) and restart your computer.
Click Update → Check for updates (see step 5).
If you still receive the "error downloading update file" message, uninstall and reinstall your ESET product.
Need further assistance? Contact ESET Technical Support.