Which Antivirus uses least resources in XP?

I am using AVG on one PC, NAV SE on 2nd PC. NAV has expired and I have NAV Corp Ed to install. Under Task Mgr AVG appears to use ~2.5MB in 3 separate processes; NAV appears to use ~250k in one process. The 2nd PC is strained on resources: used as media center with PVR (on-board encoding) and TV-out video card.

Seems I've received 1 virus on 5 years, but with a 7yo using Google Search, I feel the need to keep a current AV running. My current choice is NAV or a free AV.

Seems like an easy call to install NAV Corp Ed on both. Am I missing something?

TIA

Which Antivirus uses least resources in XP?computer repair

windows live one care, but you need to have high speed internet.

Which Antivirus uses least resources in XP?free antivirus

Windows Live One Care is not a free AV: not the best answer - appreciate all responses. Proxy:her.. best answer, solutions not appropriate.

NAV Corp Ed v10 starts at 33MBytes reducing to 6MBytes

Conclusion from this thread:

AVG %26 Norton AntiVirus Std is the best for low resource Report It


The least resource usage award goes, in my opinion, goes to NOD, available at http://www.eset.com/. Do a Google search and see what others say about this program written largely in pure Assembler code; very small foot print on your system. There are other excellent anti-virus out there, but this one is not only excellent, but very light on the system. Good luck.
McAfee 10 but after you install it you should get the up date fron the net
I can't tell you for sure but both Norton and McAfee are resource hogs. Trend Micro is much easier on your resources.