Your RAM is a little low, but the problem is more likely to be the enormous number of anti spyware programmes you are running. Use MSCONFIG to temporarily knock them out of the startup sequence and see what difference it makes. Most of these programmes get on the internet to check for updates each time you start your computer hence the internet accessing you have observed. Just knock them all out except AVG which protects against spyware as well and see what difference it makes. You can always update or run any of these programmes if you wish in the usual way.
P.P.