Y'all might be interested to know: Up until today I had NAV2005 and AVGfree running in Harmony. The recent update by AVG to 7.0.322 almost broke my 'puter. This is not an invitation for a Symantesc bash session. I have had good results so far with NAV/NIS (good for dodo like me) The AVG upgrade blocked e-mail connection and froze NIS. Spent about 2 hours uninstalling, rebooting, reinstalling, googling, etc, etc. Went through the AVG free forums: thousands of posts describing similar problems. http://forum.grisoft.cz/freeforum/index.php?0 Plenty of advice about the dangers of running >1 AV app. Seems that virtually all firewalls will need (often a simple) adjustment after the update. AFAIK that happens with every AVG upgrade! Had not been a problem resetting things prior to tonight. Now have managed to set NAV as e-mail scanner and real time scanner. Turned off AVG e-mail scanner. "Resident shield still in place" "puter seems ok. E-mails comin' and goin'. NIS looks to be functional. Some info suggests alternative solution: turn off NAV e-mail scanner. Is it really that difficult/unstable having >1 AV app running? I really would appreciate some feedback/info on other AV that might be compatible with NAV/NIS, as I feel more than 1 is better. If I'm wrong let me know please. Still only humble home end user. NAV/NIS has been good to me for years, reluctant to change and begin again from scratch.