FDISR doesn't replace all security softwares, but it can replace any on demand scanner. On demand AV/AS/AT/AK/AR-scanners are normally used to scan your computer one time a day, because you can't run it constantly. If this scanner detects a malware on your system, it means that this malware has been on your system for quite some time (the period between two scans) and could have done its evil job already, that's too late. Using an on demand scanner once a week is absurd, because if it finds a malware, it means that this malware has been on your system during 1 upto 7 days, time enough to execute itself. The copy/update function of FDISR does EXACTLY the same thing + extra advantages : - copy/update has no missing signatures like on demand scanners, so no incomplete removal. - copy/update has no false/positives like on demand scanners, so no possible system damage. - copy/update replaces ALL on demand scanners, while on demand scanners have to run one by one. - copy/update is much faster, than the total scan time of ALL on demand scanners. The MAIN AV/AS/AT/AK/AR-scanners are only useful, if they have a real-time shield, because that real-time shield will protect you during the period between two scans or two copy/updates. If they don't have a real-time shield, they have the same function as on demand scanners and therefore worthless as real-time protection. Conclusion : if the source snapshot of a copy/update is clean, you don't need - on demand AV/AS/AT/AK/AR-scanners anymore. - main AV/AS/AT/AK/AR-scanners WITHOUT real-time shield anymore. If you don't agree with me, challenge me. PS: this has nothing to do with frozen snapshots, I'm talking about NORMAL snapshots and frozen snapshots are in fact the same as normal snapshots and what has been said counts for frozen snapshots also.