Yo, I used drive cleanup, sure cleaned out alot, 71 USB devices, 50 disk devices, 88 storage volumes, 70 keys from registry. HOWEVER I try to install a Weather Direct Light Wireless Device which talks to a LaCrosse weather station or its sensors... This USB device is SUPPOSED to self- register and NOT require any driver installation. Since I have no drivers I tell the wizard OK check this once on the web etc. but it won't find anything, code 28 drivers not installed. XP SP3 What else can I try?