800MHz, 768MB SDRAM, OS 10.4.11, Passed verification.
Any other suggestions besides wiping the drive. The thing is so slow, backing up the files estimates taking a whole day. Is there some diagnostic program to see what's causing the slow down?
Okay, 800MHz is going to be a bit slower than my 1GHz, I imagine. One thing I've notice with mine is that with it running some of the newer versions of software, that they can be a bit slower at some things than previous older versions were. I only have my iMac and older Macs as a point of reference for speed, (don't have any modern Intel Macs) but my iMac does not seem terribly slow to me.
As far as the backup is concerned, is that estimated using USB, if so it's because USB on our iMacs is only USB 1.1, slow for things like hard drives. If you've got an external firewire drive you could make a bootable clone to it using Carbon Copy Cloner and after checking to see if it's bootable, if so, then boot from the external, erase the iMac's internal hard drive and clone back to it from the external to the internal, this effectively defrags the hard drive and may offer an improvement in speed if the internal was severely fragmented.
Do you have any (many) startup items running that could be hogging the processor?
In Activity Monitor you can view
All Processes and sort by
%CPU to see what running and if anything seems to be using an abnormal amount of the processor.
One last thing you could try that's quick and dirty is to try a Safe Boot to see if that clears up anything. Here's how:
Mac OS X: What is Safe Boot, Safe Mode?