Disk Warrior reports: system symbolic link files broken
We have had an issue recently with the iMac my teen son uses, and it seemed to be resolved, as reported in this thread:
https://discussions.apple.com/thread/4877212?answerId=21478407022#21478407022
Short version: I had to use an external DVD drive to get the computer to start from the install disk, and that allowed me to run Disk Utility, which (apparently) made the needed repairs.
However now the computer has reverted to those problems, basically it won't start up: grey screen or at best, spinning ball and Apple but no further.
So I went for a copy of Disk Warrior, and it found and repaired problems with the Directory (replaced it). But then I ran a check on Files and Permissions and it came up with 'system symbolic link files' that are broken and can't be repaired.
(The HD came up fine with AHT and with the Hardware check on DW.)
Should I try to run another repair program or just do a fresh install of the OS?
If the latter, I assume from our 10.6 disks; what is on there is 10.6.8. We have a Time Machine backup from two days ago, in case needed, but I've never restored from it. A re-install of the system software should not affect the rest of the data on the computer, right?
Thanks for any advice!
MacPro, MBP, many Macs in the house, Mac OS X (10.6.8)