ubuntu won't load, unsupported WMI

It takes 3 or 4 boots before I can get into Ubuntu...it happened twice now...I just installed 10.04 3 days ago, and yesterday and today when I booted up the computer...I get a text screen...the first day it said nothing except to log in, however this morning it said there was "no or unsupported WMI interface, unable to load.... it finally did load but it seems the problem is deteriorating. I'm ignorant on what this WMI is, and what could be the problem of not allowing me to directly boot into normal mode.

Also when I get this kind of boot screen...just black with white text...sorry don't know what to call it...what should I type after logging in to try a normal boot or diagnosed the problem?

My computer is a desktop Acer AMD Athlon(tm) 64 X2 Dual Core Processor 3800+, GeForce 6100 nForce 405, MCP61 High Definition Audio, 1G Memory DDR2