My sister put Norton on her 3.2Ghz, 1GB RAM machine and it was running slower than my old 466 Celeron that I use as a test machine. I have been round and uninstalled Norton and replaced it with Avast and she says it's never run as fast or as smoothly.
I'm very reluctant to get rid of AVG as, updating problems aside, I have never had any problems while using it. In fact (touch wood) I have never had a single virus in seven years of home computing. However, I am hearing some good things about Avast, including reports that it has found things that others have missed,
Hmm - A bit of a dilemma. :?