blasklist? and problems

When I log on the computer, a message says that some objects may not be something or something and that I can look at the 'blacklist.ini'. what is this and should I be delving into this for any reason? I said "no" this time and the cpu information object didn't show up, so I figure it had some problems.

Also, I put the little Enterprise object that flies across the screen. Until this morning, it's worked well. Suddenly, it's been slow and it stops and starts. Hmmm. Then when I try to modify it or anything, the screen freezes up and I have to restart desktop or log off and then back on again. When I look at the running tasks, it says that desktop objects isn't responding. Anyone have an idea why this should be so irregular? Thanks.