XP SP3 (fully updated), Online Armor v2&3 (both) paid (with or without HIPS enabled/OA shutdown), Spy Sweeper v5.8, SandBoxie v3.32, N32 (anti-virus only). History, and my soultion- 1. N32 v667 (v672 too!)- I WAS having problems with my OE6 email "not always (?)" putting the "scanned by N32..." message on the bottom of received/sent email?!!! Msmin.exe was checked as email client in settings... a. I contacted N32 support with sys info..., and they suggested trying a clean uninstall & upgrade to N32 v672? I uninstall N32/OA, and do a thorough cleanup (I'm a software tech). b. As soon as go to install v672- It pops up and says "Detects Antivir...?"? I double check to be sure that free Antivir is on-demand, and click Ignore. Complete N32 installation, and new settings... 2. Still bad?!- N32 now shows on the OE6 email page, but scanned by N32 msg is still intermittant? (I have not yet reinstalled OA) I start "closely" watching Process Explorer ("nifty" free Task Manager...!), and 8min in Antivir is showing BIG cpu activity (put mouse pointer on cpu spike)- ALL Email sent/received "after" this activity, always has the N32 msg!? FIX!- I uninstall Antivir/clean, and ALL email msgs now always have the scanned by N32 msg! ) I reinstall Antivir/on-demand, and intermittant N32 email msg problem comes back! I uninstalled Antivir for good! What free on-demand anti-virus plays nicely with N32?- According to latest AV-Comparitives- Antivir is the only free antivirus (no POP3) with a better detection rate than N32 http://www.av-comparatives.org/seiten/ergebnisse_2008_11.php Note: They only rate Antivir as Advanced, because of many FP's?- I have NEVER gotten FP's with their "Standard" scan settings (Advanced yes)! N32 has to do better, or I'm going to Antivir after my lic expires! ? ~~~ SanBoxie free tip!- AFTER you get the 5sec grayed-out nag screen, wait ANOTHER 5sec before you click to open- SB will now be FAST, and less problematic... (this could be from my OA?)!