If you suspect that a new update of the detection engine and/or program modules may be unstable or corrupt, you can roll back to the previous version and disable updates for a set period of time. Alternatively, you can enable previously disabled updates if you had postponed them indefinitely. ESET products record snapshots of the detection engine and program modules for use with the rollback feature. In order to create detection engine snapshots, leave the check box next to Create snapshots of modules selected. The "Number of locally stored snapshots" field defines the number of previous detection engine snapshots stored.
Press the F5 key to access Advanced setup.
Version 9.x and earlier: click Update rollback → Rollback.