How do I access Disk Utility for 10.7.1?

How do I access Disk Utility for 10.7.1? I found it in the forums a few weeks ago, used it, then lost the directions. This is a last ditch attempt

to use OS Lion. I parted my hair incorrectly when I installed and have been plagued by the dread rainbow spinning ball in EVERY application. Yes, every. Name one, Safari, Firefox, Text Edit, Mail, Excel, Word, iTunes, Garage Band, Calculator, Calender, iPhoto....yes, every, and I cannot

find a solution that works. I have back up files on two different hard drives 500 gig and 1 terrabyte with all my music, photo and writing files.

I am a writer and a musician so imagine the frustration. OS 10.6 is an option of course. My dedication to Apple and each new OS is deep so

I am hoping that somehow there will a fix, an upgrade, something that does not require me to go bac to the much more endangered species named OS.

hahhaa! Just stalled waiting for the ball to finish with it's random spinning.... SO, this is like a last desperate .... it just did two more stalls.
NO OTHER apps running, just little Firefox holding on for dear life, last desperate request for a fix.

MacKeeper has been great in sending helpful directions for getting the Antivirus to work after it mysteriously decided to stop working, Quite MacKeeper, go to Activity Monitor, force quit helper, start up MacKeeper and run program. It works!

SO before my third stall stops me, please post directions to open disk utility in administration mode so that I can do any further repairs that have not worked by using it from the open system. Also keychain synching stopped working with Lion.

Thanks to any and all who can help.