Hello all, I have a Macbook Pro that has served many faithful years under relatively light usage (web browsing, picture saving, etc). Yesterday it refused to connect to my home WiFi, so I restarted it. It took much longer than usual to restart, but once it started up it connected to WiFi fine, and all was well... or so I thought. The issue re-occurred this morning. It would simply refuse to recognize any WiFi networks. So, I restarted it again, but this time it refused to start back up. It would get to the apple with the spinning cog wheel and sit there for as long as I left it. I let it be for 30-45 minutes to see if It would finally boot, but it did not. I powered it down and immediately suspected hard drive failure. I keep extremely current time machine backups so all of my data is safe. I haven't heard any clicking or any abnormal noises from the hard disk, but it is beyond 6 years old. I then booted to my OS X installation DVD (10.7) and verified and repaired the disk and the disk permissions. Many permissions were repaired, but nothing was found wrong during the disk check. After the permissions were repaired, it booted just as quickly as normal. No WiFi issues either. What do you guys think? Is it early hard drive failure, or just some permissions issues? Would you replace the drive at this point?