My Imac freezes 5 x a day at least... please help!!!

Hello,
I'm pulling my hair out because I use my Imac for all my work. Everyday I hold down the reset button *at least 5 times* because the Imac freezes.
-Updated all software
-Repaired disk permissions
-Bought another gig of ram
-Won't completely verify disk, says: *Error: underlying task reported failure on exit, 1HFS volume needs repair*
- Won't allow me to repair disk
What I don't get is that when things freeze, I hit force quit and they don't quit?!! I mean the little black arrow remains underneath the icon. Then I hit "restart" in menu and it won't restart, it just freezes. I thought that was the whole point of force quitting?
So after the screen just freezes blue with the black spinning icon, I have to hold the reset button. Sometimes I don't even get that far, I have to do it on the desktop.
Any help would be greatly appreciated!!! The guy at the computer store said good luck when I asked if anyone in town fixed Macs, lol!

+Won't allow me to repair disk+
It is a different procedure from repairing permissions, which was not the problem, but which you did correctly perform. You can only repair disk using Disk Utility on another volume, not from the same volume, and the other volume must be the same version of OS X.
If you are still using Tiger 10.4.11, not Leopard or SL, boot from your grey-labeled Install Disc and after the first screen there will be a menu bar at the top that includes a Utilities menu from which you can choose Disk Utility. You will be able to try the Repair Disk button, and you should run it completely through at least twice to see if you can get it repaired.
Then quit and restart, don't continue further into the install process. Eject the Install Disc.
If your OS X is now Leopard or SL, make sure that you use the same disc that installed your current OS X.
Message was edited by: myhighway

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9/11/08 8:00:35 PM com.vmware.launchd.vmware[48] Internet Software Consortium DHCP Server 2.0
9/11/08 8:00:35 PM com.vmware.launchd.vmware[48] Copyright 1995, 1996, 1997, 1998, 1999 The Internet Software Consortium.
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