We can try some basic troubleshooting steps and see if that works or not. First we can reset the PRAM and NVRAM of your Mac. Reset PRAM and NVRAM
Then run Disk Utility in Single User Mode. Follow the steps below;
Turn your Mac off. Turn it back on and this time hold down the Command (Apple) key and the S keys at the same time. Then type the following command... /sbin/fsck -fy (note the space between fsck and -fy) If you can't run /sbin/fsck - fy then type only fsk - fy Hit return and the disk utility should run and let it finish. When it finishes and there is no error, then type reboot and hit return. Let the Mac boot up. (Disk Utility will fix all system errors, bad preferences files etc)
Ashik - I'm still on the first part of your answer - so i restarted my mac , holding the keys for 3 chimes and went to disc utility - there was no single or other User Mode! plus when I opened the disc utility, 3 choices came up - 320.07 GB WDC WD3200BEVT-ODAORTO Media and under that [like it was nested] was the Mac HD icon and then a disc symbol w/MATSHIT DVD-R UJ-857
Whaaaat??? which do I choose? and the only CHOICES ARE
VERIFY DISK PERMISSIONS VERIFY DISK
REPAIR DISK PERMISSIONS REPAIR DISK
Do I run Verify Disk?
I clicked on the Mac HD icon and it came back as HD ok on both things - after the control - S, too! Shall I go back and clic on the 320.07 GB and run Verify Disk?
Plus, I did the Chrome thing and when I got to library, there was no com.apple,chrome.plist!!! and no com.google either! arggg!
sorry, I did hold down the Command [apple] key + S & got to the screen w/white letters... then typed in the
/sbin/fsck -fy and hit return - that's when it said that Mac HD was ok!
Let you know what? I did what you said - what should I look for? I only got that corrupt preferences once - and, would that corrupt preference file show up on the Verify Disk thingy?
no... had to press the start button...
We've already repaired your HD. Turn off your Mac completely and turn it back on. Don't press any keys. Does it boot directly into desktop now ?
yes... and, it still freezes - oy! Not as often, and it freezes... and, I just won an ebay auction for a 27" iMac  - hope it works better!