IMac gone buggy

Question

Freezing every few minutes, crashing every 15-45 minutes. Never run any Windows OS on it, neither in Boot Camp or Parallels Desktop nor VMware Fusion. Canb't even scan for malware with iAntivirus; it crashes before the scan completes.
What's going on and what are my options?

Answer 1

HI,
There aren't any Mac viruses so you can rule that out.
Make sure your system software is up to date. Click your Apple Menu / Software Updates. If everything is up to date ...
Boot from your install disc, run Disk Utility to Verify and if necessary, Repair any errors on the startup disk.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
(In Mac OS X 10.4 or later, you must select your language first from the installer menu)
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your start up disk and click Restart
While you have the Disk Utility window open, look at the bottom of the window. Where you see Capacity and Available. *Make sure there is always 10% to 15% free disk space*