You could start by getting rid of all the iobit security products since two av" should not be on your system, uninstall via remove programs then reboot and then go to here http://thewebatom.net/uninstallers/security-software/ and run the iobit removal tool No16 in the list, once completed reboot again.
You also need to download the latest version of avast which you can find on there website http://www.avast.com/, save the download and then uninstall you current version and reboot and run CCleaner to get rid of the leftovers, now install your new copy of avast and reboot again, once you have completed all this i recommend that you also upgrade your xp to SP3.