How do I uninstall ESET Smart Security/ESET NOD32 Antivirus? (4.0)
Due to corrupted installations or newer program releases, reinstalling your ESET security product is sometimes necessary.
Uninstall
Click Start → All Programs → ESET → Uninstall. After you uninstall, you will need to restart your computer.
Warning: Do not attempt to uninstall your ESET security product using the Windows Add or Remove Programs utility from the Control Panel.
After restarting, confirm that you can see hidden files and folders by clicking Start → Control Panel → Folder Options → View and select the Show hidden files and folders option.
Click Start → My Computer and then navigate to and delete the following folders:
C:\Program Files\ESET
C:\Documents and Settings\All Users\Application Data\ESET
C:\Documents and Settings\%USER%\Application Data\ESET
Windows Vista and Windows 7 Users must delete the following folders:
C:\Program Files\ESET
C:\Program Data\ESET
NOTE: The uninstaller may remove the above folders automatically. If you are unable to find the folders after selecting Show hidden files and folders, the removal is complete.