yes, I have tried botting from it and repairing the permissions, to no avail for either
the thing is, when I boot from the disk, the apple logo shows up, along with the loading circle below it, and sticks there
Where or who did you purchase the upgrade disc from?
Which volume did you select? How large is your hard drive and how much hard drive space do you have left? Was wondering if you have enough for Snow Leopard.
Disconnect all peripherals from your computer.
Boot from your install disc & run Repair Disk from the utility menu. To use the Install Mac OS X disc, insert the disc, and restart your computer while holding down the C key as it starts up.
Select your language.
Once on the desktop, select Utility in the menu bar.
Select Disk Utility.
Select the disk or volume in the list of disks and volumes, and then click First Aid.
Click Repair Disk.
Restart your computer when done.
Repair permissions after you reach the desktop-http://support.apple.com/kb/HT2963 and restart your computer. Now try to upgrade. Any success?