To get your disk. There was a recent too long discussion where a member could not wrap their head around the fact that if you need a XP CD and you have a license you can download it. I shared a prior discussion and I wonder if they ever got it done.
http://www.cnet.com/products/lenovo-g550-2958-15-6-core-2-duo-t6600-windows-7-pro-xp-pro-downgrade-3-gb-ram-320-gb-hdd-series/ shows it came with Windows 7 so maybe it's time to try ordering restore media if you don't want to deal with the web?
I have a Lenovo laptop G550 running xp, but no disk,
DISK READ ERROR OCCURED
press ctrl+alt+del to restart
But no go with that, any ideas

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic