The posting above by Dealer works very well but let me amplify on his directions for those going into uncharted territory (the registry).
1. Open regedit (If you can't figure out how to do this or do not feel comfortable with any of the steps below, STOP - you should not go any further).
2. browse to:
3: Right click on "Adcanced" then select "New" then "DWORD Value".
4. Enter a new DWORD Value: EnableBalloonTips
5. It should default to a value of 0 (zero) but check to be sure.
6. Close regedit and those supremely annoying balloons will be gone forever.
I find it incredible that a company such as Microsoft, with all their collective IQ, provides such a universally unwanted and aggravating feature that has virtually no value. Why do they want to piss off so many people and get so little in return for the effort?
I learned the instructions I detailed above from a column in the latest issue of MaximumPC Magazine (March - page 14). My only connection to this magazine is that I pay for a subscription. I think it is one of the best rags out there now as a source of excellent and seeming candid information.
The balloons aren't so bad in the beginning, there should be a rule with each balloon popup, that would be cool...ps,...ms did recognize what you just posted, so the put a dissable balloons in the power toys, problem is, power toys isn't available any more