If so I run into issues with that machine every month. The issue I see here is not so much SP3 but the machine is known to be cranky. You can try a new CD/DVD drive to fix that common failure.
Toshiba Satellite 2415 notebook, Windows XP Home Edition
I downloaded Windows XP Service Pack 3 from Windows Update on Saturday, September 20. It partially installed, then encountered a problem and would not complete installation. Now the DSL modem is disabled (I'm using my wife's desktop on the same DSL, so I know the DSL is working). I tried reinstalling the modem using the Qwest installation disk, but CD-ROM will not recognize the format. I tried System Restore to the day before; SR works up until the final "next" button, at which point nothing happens. Any ideas?