My MacBook Pro can no longer read/play/do anything with DVDs. I tried re-installing OS and Leopard but discs are rejected almost as soon as I put them in. For some reason my computer is rejecting any and all DVDs.

A few weeks ago I noticed my MacBook Pro was unable to open or read, etc... DVDs. This included DVDs with jpeg photos on them and DVD videos. I thought I might have deleted something necessary to DVD use. So I tried to re-install OS software. This included Snow Leopard and the original two Mac OS X discs. None would open or play or install. All were spit out of computer soon after I stuck them in.
So now what can I do? Thank you.

Do you recommend the canned air
It works just as well as the regular cleaning discs works.  The only disadvantage is that you will need to keep purchasing canned air once it runs out.  Cleaning discs last forever or until the tiny bristles on the disc wears out.  Whichever comes first.
Any store that sells cds & dvds will also sell disc cleaners.  Prices vary but they all do the same thing - clean your slot drive.

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        SharePointBrowserPlugin: Version: 14.0.0 [Click for support]
        JavaAppletPlugin: Version: Java 7 Update 75 Check version
        OfficeLiveBrowserPlugin: Version: 12.2.0 [Click for support]
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        fbplugin_1_0_1: Version: Unknown [Click for support]
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        AdBlock
        Ebay Shopping Assistant [Adware! - Remove]
        Searchme [Adware! - Remove]
        Amazon Shopping Assistant [Adware! - Remove]
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        DivX  [Click for support]
        Flash Player  [Click for support]
        Java  [Click for support]
    Time Machine: ℹ️
        Skip System Files: NO
        Mobile backups: ON
        Auto backup: YES
        Volumes being backed up:
            Macintosh HD: Disk size: 499.25 GB Disk used: 437.25 GB
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            Total size: 2.00 TB
            Total number of backups: 3
            Oldest backup: 2015-02-02 03:51:54 +0000
            Last backup: 2015-02-03 16:31:57 +0000
            Size of backup disk: Excellent
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            20%    backupd
             9%    mds
             4%    WindowServer
             1%    diskimages-helper
             0%    mds_stores
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        576 MB    mds_stores
        215 MB    Safari
        103 MB    Finder
        103 MB    Google Drive
        77 MB    WindowServer
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        3.64 GB    Free RAM
        3.19 GB    Active RAM
        539 MB    Inactive RAM
        1.21 GB    Wired RAM
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        0 B    Page-outs
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    Each country regulates wireless networking differently. Wi-Fi devices are restricted to certain frequencies and power levels. The client devices try to find out where they are and configure themselves accordingly. Since a wireless access point (WAP) usually does not move across national boundaries, the Wi-Fi regulatory domain (country code) is set by querying the first one to respond when the client initializes itself. You don't have any direct control over it on the client. If your device is picking up the wrong country code, and is therefore locked out of using some Wi-Fi channels or operating at full power, the only lasting solution is to fix or remove the misconfigured WAP.
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    Copy the selected text to the Clipboard by pressing the key combination command-C.
    Launch the built-in Terminal application in any of the following ways:
    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
    ☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
    ☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.
    Paste into the Terminal window by pressing command-V.
    The command may take a noticeable amount of time to run. Wait for a new line ending in a dollar sign ($) to appear.
    A TextEdit window will open with the output of the command. The first line should look like this:
    SSID BSSID RSSI CHANNEL HT CC SECURITY (auth/unicast/group)
    Each line below that one represents a WAP within range. Compare the two-letter code in the column headed "CC" with the ISO code for your country. The code "X0" means that the country couldn't be determined. If a WAP with a wrong code is not under your control, try restarting the computer as close as possible to your own router.

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