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    cudmalcolm
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    <h1>How To Fix Yahoo! Messenger Error 999</h1>
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 1:Repair Registry Entries Associated with Error 999

    </h4>
    <p>Manually editing the Windows registry to remove invalid Error 999 keys is not recommended unless you are PC service professional. Incorrectly editing your registry can stop your PC from functioning and create irreversible damage to your operating system. In fact, one misplaced comma can prevent your PC from booting entirely!</p>
    <p>Because of this risk, we highly recommend using a trusted registry cleaner such as
    WinThruster [download](Developed by Microsoft Gold Certified Partner) to scan and repair any Error 999-related registry problems. Using a
    registry cleaner [download]automates the process of finding invalid registry entries, missing file references (like the one causing your 999 error), and broken links within the registry. A backup is automatically created before each scan, with the ability to undo any changes in a single click, protecting you against the possibility of PC damage. The best part is that
    repairing registry errors [download]can also dramatically improve system speed and performance.</p>
    <br />
    <div>
    <p>
    Caution:Unless you an advanced PC user, we DO NOT recommend editing the Windows registry manually. Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows. We do not guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.</p>
    </div>
    <p>To manually repair your Windows registry, first you need to create a backup by exporting a portion of the registry related to Error 999 (eg. Yahoo! Messenger):</p>

    1. Click the
      Startbutton.
    2. Type "
      command" in the
      search box… DO NOThit
      ENTERyet!
    3. While holding
      CTRL-Shifton your keyboard, hit
      ENTER.
    4. You will be prompted with a permission dialog box.
    5. Click
      Yes.
    6. A black box will open with a blinking cursor.
    7. Type "
      regedit" and hit
      ENTER.
    8. In the Registry Editor, select the Error 999-related key (eg. Yahoo! Messenger) you want to back up.
    9. From the
      Filemenu, choose
      Export.
    10. In the
      Save Inlist, select the folder where you want to save the Yahoo! Messenger backup key.
    11. In the
      File Namebox, type a name for your backup file, such as "Yahoo! Messenger Backup".
    12. In the
      Export Rangebox, be sure that "
      Selected branch" is selected.
    13. Click
      Save.
    14. The file is then saved with a
      .reg file extension.
    15. You now have a backup of your Yahoo! Messenger-related registry entry.

    <p>The next steps in manually editing your registry will not be discussed in this article due to the high risk of damaging your system. If you would like to learn more about manual registry editing, please see the links below.</p>
    <br />
    <div>
    <p>We do not claim any responsibility for the results of the actions taken from the content linked below – complete these tasks at your own risk.</p>
    </div>
    <p>
    Windows XP
    <br />
    /windows_xp_registry.htm
    </p>
    <p>
    Windows 7
    <br />
    /windows_7/registry_edits_for_win7.htm
    </p>
    <p>
    Windows Vista
    <br />
    /kb/ LetMeFixItMyselfAlways
    </p>
    <br />
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    <h4>

    Step 2:Conduct a Full Malware Scan of Your PC

    </h4>
    <p>There is a chance that your 999 error could be related to a malware infection on your PC. These malicious intruders can damage, corrupt, or even delete Runtime Errors-related files. Furthermore, there&apos;s a possibility that the 999 error you are experiencing is related to a component of the malicious program itself.</p>
    <br />
    <div>
    <p>
    Tip:If you do not already have a malware protection program installed, we highly recommend using Emsisoft Anti-Malware (
    download here). They offer a malware removal guarantee that is not offered by other security software.</p>
    </div>
    <br />
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 3:Clean Out Your System Junk (Temporary Files and Folders) With Disk Cleanup (cleanmgr)

    </h4>
    <p>Over time, your computer accumulates junk files from normal web surfing and computer use. If this junk isn&apos;t occasionally cleaned out, it can cause Yahoo! Messenger to respond slowly or provides an 999 error, possibly due to file conflicts or an overloaded hard drive. Cleaning up these temporary files with Disk Cleanup might not only solve your 999 error, but can also dramatically speed up the performance of your PC.</p>
    <br />
    <div>
    <p>
    Tip:Although Disk Cleanup is a wonderful built-in tool, it will not completely clean up all of the temporary files on your computer. Other programs that you frequently use such Microsoft Office, Firefox, Chrome, Live Messenger, and hundreds of other programs are not cleaned up with Disk Cleanup (including some Yahoo! Inc. programs).</p>
    </div>
    <p>Because of the shortcomings of the Windows Disk Cleanup (cleanmgr) tool, we highly recommend using a specialized hard drive cleanup / privacy protection software such as
    WinSweeper [download](Developed by Microsoft Gold Partner) to clean up your entire computer. Running
    WinSweeper [download]once per day (using automatic scanning) will ensure that your computer is always clean, running fast, and free of 999 errors related to temporary files.</p>
    <p>How to run
    Disk Cleanup (cleanmgr) (Windows XP, Vista, 7, 8, and 10):</p>

    1. Click the
      Startbutton.
    2. Type "
      command" in the
      search box… DO NOThit
      ENTERyet!
    3. While holding
      CTRL-Shifton your keyboard, hit
      ENTER.
    4. You will be prompted with a permission dialog box.
    5. Click
      Yes.
    6. A black box will open with a blinking cursor.
    7. Type "
      cleanmgr" and hit
      ENTER.
    8. Disk Cleanupwill begin calculating how much occupied disk space you can reclaim.
    9. The Disk Cleanup dialog box will appear with series of checkboxes you can select. In most cases, the
      "Temporary Files"category will occupy the most disk space.
    10. Check the boxesof the categories you want to clean and click
      OK.

    <br />
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 4:Update Your PC Device Drivers

    </h4>
    <p>999 errors can be related to corrupt or outdated device drivers. Drivers can work one day, and suddenly stop working the next day, for a variety of reasons. The good news is that you can often update the device driver to fix the Error 999 problem.</p>
    <p>Finding the exact driver for your Error 999-related hardware device can be extremely difficult, even directly on the Yahoo! Inc. or related manufacturer&apos;s website. Even if you are experienced at finding, downloading, and manually updating drivers, the process can still be very time consuming and extremely irritating. Installing the wrong driver, or simply an incompatible version of the right driver, can make your problems even worse.</p>
    <p>Because of the time and complexity involved in updating drivers, we highly recommend using a
    driver update toolsuch as
    DriverDoc(Developed by Microsoft Gold Partner) to automate the process.</p>
    <p>
    DriverDocupdates all of your PC device drivers, not just those associated with your 999 error.
    DriverDoc&apos;sproprietary One-Click Update™ technology not only ensures that you have correct driver versions for your hardware, but it also creates a backup of your current drivers before making any changes. Maintaining a driver backup provides you with the security of knowing that you can rollback any driver to a previous version if necessary. With updated device drivers, you can finally unlock new hardware features and improve the speed and performance of your PC.</p>
    <p>
    <script src=”/errors/images/open.png” alt=”Open”></script>
    </p>
    <h4>

    Step 5:Utilize Windows System Restore to "Undo" Recent System Changes

    </h4>
    <p>Windows System Restore allows you to "go back in time" with your PC to help fix your Error 999 problems. System Restore can return your PC&apos;s system files and programs back to a time when everything was working fine. This can potentially help you avoid hours of troubleshooting headaches associated with 999 errors.</p>
    <br />
    <div>
    <p>
    Please Note:Using System Restore will not affect your documents, pictures, or other data.</p>
    </div>
    <p>To use
    System Restore (Windows XP, Vista, 7, 8, and 10):</p>

    1. Click the
      Startbutton.
    2. In the search box, type
      "System Restore"and hit
      ENTER.
    3. In the results, click
      System Restore.
    4. Enter any administrator passwords (if prompted).
    5. Follow the steps in the
      Wizardto choose a restore point.
    6. Restore your computer.

    <br />
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 6:Uninstall and Reinstall the Yahoo! Messenger Program Associated with Error 999

    </h4>
    <p>If your 999 error is related to a specific program, reinstalling Yahoo! Messenger-related software could be the answer.</p>
    <p>Instructions for
    Windows 7 and Windows Vista:</p>

    1. Open Programs and Features by clicking the
      Startbutton.
    2. Click
      Control Panelon the right side menu.
    3. Click
      Programs.
    4. Click
      Programs and Features.
    5. Locate
      Yahoo Messenger Error 999-associated program(eg. Yahoo! Messenger) under the
      Namecolumn.
    6. Click on the Yahoo! Messenger-associated entry.
    7. Click the
      Uninstallbutton on the top menu ribbon.
    8. Follow the on-screen directions to complete the uninstallation of your Error 999-associated program.

    <p>Instructions for
    Windows XP:</p>

    1. Open Programs and Features by clicking the
      Startbutton.
    2. Click
      Control Panel.
    3. Click
      Add or Remove Programs.
    4. Locate
      Yahoo Messenger Error 999-associated program(eg. Yahoo! Messenger) under the list of
      Currently Installed Programs.
    5. Click on the Yahoo! Messenger-associated entry.
    6. Click the
      Removebutton on the right side.
    7. Follow the on-screen directions to complete the uninstallation of your Error 999-associated program.

    <p>Instructions for
    Windows 8:</p>

    1. Hover the cursor in the
      bottom left of the screento produce the
      Start Menuimage.
    2. Right-Clickto bring up the
      Start Context Menu.
    3. Click
      Programs and Features.
    4. Locate
      Yahoo Messenger Error 999-associated program(eg. Yahoo! Messenger) under the
      Namecolumn.
    5. Click on the Yahoo! Messenger-associated entry.
    6. Click the
      Uninstall/Changeon the top menu ribbon.
    7. Follow the on-screen directions to complete the uninstallation of your Error 999-associated program.

    <p>After you have successfully uninstalled your Error 999-associated program (eg. Yahoo! Messenger), reinstall the program according to the Yahoo! Inc. instructions.</p>
    <br />
    <div>
    <p>
    Tip:If you are positive that your 999 error is related to a specific Yahoo! Inc. program, uninstalling and reinstalling your Error 999-related program will likely be the solution to your problem.</p>
    </div>
    <br />
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 7:Run Windows System File Checker ("sfc /scannow")

    </h4>
    <p>System File Checker is a handy tool included with Windows that allows you scan for and restore corruptions in Windows system files (including those related to Error 999).</p>
    <p>To run System File Checker (
    Windows XP, Vista, 7, 8, and 10):</p>

    1. Click the
      Startbutton.
    2. Type "
      command" in the
      search box… DO NOThit
      ENTERyet!
    3. While holding
      CTRL-Shifton your keyboard, hit
      ENTER.
    4. You will be prompted with a permission dialog box.
    5. Click
      Yes.
    6. A black box will open with a blinking cursor.
    7. Type "
      sfc /scannow" and hit
      ENTER.
    8. System File Checker will begin scanning for Error 999 and other system file problems (be patient – the system scan may take a while).
    9. Follow the on-screen commands.

    <br />
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 8:Install All Available Windows Updates

    </h4>
    <p>Microsoft is constantly updating and improving Windows system files that could be associated with Error 999. Sometimes resolving your Runtime Errors problems may be as simple as updating Windows with the latest Service Pack or other patch that Microsoft releases on an ongoing basis.</p>
    <p>To check for
    Windows Updates (Windows XP, Vista, 7, 8, and 10):</p>

    1. Click the
      Startbutton.
    2. Type "
      update" into the search box and hit
      ENTER.
    3. The
      Windows Updatedialog box will appear.
    4. If updates are available, click the
      Install Updatesbutton.

    <br />
    <script src=”/errors/images/open.png” alt=”Open”></script>
    <h4>

    Step 9:Perform a Clean Installation of Windows

    </h4>
    <br />
    <div>
    <p>
    Caution:We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve Error 999 problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately (
    download a highly-recommended backup solution) to protect yourself from permanent data loss.</p>
    </div>
    <p>This step is your final option in trying to resolve your Error 999 issue. Reinstalling Windows will erase everything from your hard drive, allowing you to start again with a fresh system. Furthermore, a clean install of Windows will also quickly clean out any and all "junk" that has accumulated over the normal usage of your computer.</p>
    <br />
    <div>
    <p>
    Please Note:If 999 errors still persist after a clean install of Windows, your Runtime Errors problem MUST be hardware related. If that is the case, then it is likely you will need to replace the associated hardware causing the 999 error.</p>
    </div>
    <br />

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