I have been using ZoneAlarm Security Suite as firewall and AV. I would like to now use it only as firewall and install NOD32 as antivirus program. First I tried disabling AV (then also disabling e-mail scanning) in ZASS, but NOD32 would not install. Then I uninstalled ZASS completely, verified with Zone Labs' LSPVIEW utility that there were no remaining LSP entries; NOD32 still would not install. I get error message: "(121) NOD32MOD_WINNT_ENGLISH_STANDARD". 1. Is there any way to install NOD32? Eset tech support suggested I search for any remaining ZA files.I cannot find any. There are 3 registry entries under Zone Labs, but I hesitate to delete these. 2. Is it possible to use ZASS and NOD32 as I proposed? Or do I have to downgrade (and pay more?) to a ZA product without AV? Will appreciate any help. Fortunately, I am using NOD32 on a trial basis. Have lost nothing yet but lots of time! BTW I am running XP Pro SP2, ZASS 5.5. Downloaded latest NOD32 yesterday.