My xbox 360 disk (halo 3) was a little scrached so I took it to family video tho be cleaned. Now Everything loads slow and when halo says loading... Done it freezes for up to five minutes. I talked to the person working ther and they said that there was a whitish ring around the disk but it worked fine before I got it cleaned. What should I do?

if it still works ( despite freezing) you could sell it on ebay cheap and get some of your money back. Then just buy one off amazon.com.