I feel the 'tons of rubbish' are probably crashing Adaware. Try installing Spybot-S&D, scan with that & remove the rubbish - click here. Also, run CWShredder click here. As a preventive measure get SpywareBlaster click here. When you're relatively clean, try running Adaware again. If it's still crashing uninstall it, d'load a fresh copy (w/o the aid of a d'load manager) & install the fresh copy.
I have Win98se, Adaware & NAV & have never had conflicts with them. HTH, G