The idea for this quick GUIDE was thought up in this thread by kingjr3. Like the networking thread the idea of this is to have a quick point of reference for those common questions. How to Zap PRAM Zapping PRAM is simple, just reboot your Mac and hold down "Command(the Apple key)+Option(the Alt key)+P+R" while it is booting, when you hear the startup sound for the seond time the operation is complete, and you can release the key combination. Now just let your Mac boot as normal. How to Repair Permissions • Navigte to "Applications > Utilities", and open up "Disk Utility". • Select the volume where your OS resides, and hit the "Repair Disk Permissions" button. If you are comfortable with using the Terminal (Applications > Utilities > Terminal.app), you can also enter this command to run repair permissions - "sudo diskutil repairpermissions /" (without the quotes), just enter your password when prompted. How to run FSCK • Restart your Mac holding down "Command(the Apple key)+S" key to enter 'Single user mode'. • Type "fsck -f", and hit return. • Once complete type "reboot" and hit return to reboot you Mac back in to OS X as normal. If there is anything that you think is wrong here, or you think I have missed any vital steps out, please post and let me know so that I can ammend this.