Imac is running so so so so slow,
Ok my Imac 24 is heading up to 4 years, has worked well up till 6 months ago, I'm mainly using PS, and really just the basics, mail, safari etc.
About 6 months ago I began to get the "Grey screen of death" every so often, then more frequently,
I have run disk repair from the start up disk and that seemed to make the crashing less frequent.
But now, the computer is running so slowly, starting up takes 10 minutes then take s another 10 minutes to open any application,
I am continually getting these 2 messages in the console system log (here is a copy of about 1% of it.
Apr 4 16:13:23 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:13:30 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:13:33 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:13:38 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:13:43 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:13:46 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:13:52 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:13:54 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:02 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:14:02 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:10 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:11 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:14:18 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:21 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:14:26 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:30 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:14:34 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:40 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:14:42 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:50 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:14:50 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:58 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:14:59 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:15:06 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:09 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:15:14 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:18 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:15:22 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:28 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:15:30 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:38 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:15:38 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:46 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:47 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:15:54 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:15:57 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:16:02 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Apr 4 16:16:07 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:16:16 nik-philpotts-Computer kernel[0]: disk0s2: 0xe0030005 (UNDEFINED).
Apr 4 16:16:17 nik-philpotts-Computer kernel[0]: Graphics chip error! Restarted.
Any help would be fantastic.
imac 24", Mac OS X (10.4.11), 2.16 intel core 2 duo