Xbox 360 Problems

I think I figured out what is wrong with both 360's.

My old one: The Unplayable Disc Error was described as the following on wikipedia:

The "Unplayable Disc" error has also been heavily reported. The error appears to be limited to the Hitachi CD/DVD ROM drives that replaced the earlier Toshiba drives. The error message is preceded by a loud series of grinding noises and the system returning to the dashboard. From that point forward, any disc that is put in the unit will result in the "Unplayable Disc" error (although if the user was to eject and close the disc tray in quick succession the disc may sometimes play). In the majority of cases, this error is caused by the adhesive that holds a small magnetic washer heating up and allowing the washer to affix itself to the metal top of the drive. After this occurs, the system can no longer spin the disk as necessary. Numerous fixes are available on the internet, but all involve opening the console box. Opening the console will result in the unit's warranty being voided. Microsoft will fix the error for a fee (of $99.00 USD as of November 11, 2008.)Included in the repair fee is one additional year of warranty coverage.

My new one which isn't reading the free discs and is freezing:

On November 19th 2008, Microsoft released the "New Xbox Experience". This update provided streaming Netflix capability and avatars, however some users allege that the update has caused their consoles to not properly read optical media. It is unknown whether a patch is forthcoming as Microsoft has yet to comment on the alleged problems.

FUCK YOU MICROSOFT.