But AVG + Kodac + All the tray items (near your system clock) can slow systems down considerably
If it's the free version of AVG. you could download Avira Free Antivirus, uninstall AVG, restart and install Avira (that will quicken it up a bit)
And Kodac, that installs automatically with every picture CD (Just about!)
You can stop it from starting with Windows, by running this program http://www.mlin.net/StartupCPL.shtml, and then deselecting the startup (this is reversable too)