Many of the issues you might be experiencing with your ESET product have been resolved in the latest version. We highly recommend that you upgrade to the latest version.
Open the main program window of your ESET Windows product.
If Clear is greyed out (or otherwise unavailable), restart your computer and then attempt to update again (before you restart, click here to bookmark this article). After your computer has restarted, repeat steps 2-4. Clear should now be active.