Problems with my 24inch iMac.

Hi guys,
I've been having a variety of problems with my computer over the last couple of weeks. It started off when the computer went crazy one time when I opened iTunes and crashed. It took around 3 attempts at restart to actually boot up.
Ran disk utility from the leopard install disk and the computer repaired all permissions except a few for a few itunes permissions and a couple of other ones.
I also ran the Techtool Pro series of tests, they all came back fine.
Finally, I tried resetting the P RAM
Since then other problems have included -
-Constant beachballing, even for the slightest command.
-Excessive start up time, sometimes as much as five minutes or more.
-Spotlight not working, sometimes saying 89 hours to index.
-Problems having more thank 1 program open at a time. This is a real pain in the butt for me as I frequently require a lot more than one program to do my work.
The computer's acting really weird, sometimes it's ok and then it starts beachballing and stuff so I'm really not sure what's up with it.
Extremely concerned about all of this so any tips or advice would be greatly appreciated.

Hello daft:
If your computer is still in warranty, I would either take it to an Apple store or call Applecare for diagnosis. The "randomness" of the problems suggest a possible hardware problem (to me).
Incidentally, you can forget (IMHO) about the permission stuff. Repairing them is, again IMHO, a waste of time. If you want to run something that may help, boot from your software install DVD and run repair disk.
A question - do you have at least 10-15% of your HD free at all times? If not, that will cause serious problems.
barry

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Wow,, nice reply to those trying to help"'
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Heres the info on OnyX (Free maintenance App):-
http://www.titanium.free.fr/pgs/english/apps.html
Maybe if you have an Apple Genius Bar or an Apple Approved Service Agent within close proximity it may be worthwhile to follow up with them..
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PS..try a thrift shop for a basic USB k/b (new ones are $10.00) & returnable....L
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