I've also downloaded the free version of Norton AV and scans fine as well.
Therein lies the problem.
Uninstall Norton > Download and run the Norton Removal Tool to uninstall your Norton product
Then restart your Mac.
If you want to have anti virus software instaled, use the link for ClamXav from the user tip link below.
Norton / Symantec software has caused many problems for Mac users.
User tip for viruses, trojans, and malware > Viruses, Trojans, Malware - and other aspects of Internet Security: Apple Support Communities
You'll see: "Do not install Norton Anti-Virus on a Mac as it can seriously damage your operating system. Norton Anti-Virus is not compatible with Apple OS X."
Hi Linc, I'll try this and report back. Of course, at the moment it seems to be behaving OK.
One thing that seems to coincide with this issue is when I have my chain of external FW800 drives attached (4 WD drives + CD/DVD burner). Of course, 2 of those external drives are my TM backups so I don't like leaving then unattached for very long.
I've no way to test hardware such as RAM and such. Just wondering if there's any *free* hardware utilities that can fully test the CPU, RAM, etc.
Yes it's built in. See Using Apple Hardware Test and use the long test, but there could still be problems even if it passes.
Apple Genius Bars have more sophisticated test routines.