Disc Cleanup will not run!

[Doc]

When I run disc cleanup it shows four bars and stops,
when I look at cpu usage it shows 98-100% usage. In my
microsoft classes I was told this would burn up my cpu.
Whats wrong withdisc cleanup, also I have all updates
installed.
Doc

 

[DL]

How much free space do you have?
To little, 15% ? , and it wont run

 

[Doc]

I have 25% free space(5.31GB free 14.2 used)is there
something else?

 

[Bob I]

Disk Cleanup Tool Stops Responding While Compressing Old Files
http://support.microsoft.com/default.aspx?scid=kb;en-us;812248