If you install iTunes incorrectly, the Windows error 193 will pop up on your computer screen like the following message:
iTunes was not installed correctly. Please reinstall iTunes. Error 7 (Windows error 193)
Follow the steps below to fix the Windows error 193:
  1. Reinstall iTunes and other software components.
    1. Click “Start” button, click “Control Panel” on the left list.
    2. Click “Programs and Features”, uninstall Apple Application Support, Apple Software Update, Apple Mobile Device Support, QuickTime and iTunes.
    3. Restart the computer and reinstall iTunes, QuickTime, and other software components.
    4. If the above steps can’t fix the error, go to step 2
  2. Run the System File Checker to repair any missing or corrupt files.
    1. Click “Start” button, click “All Programs”, click “Accessories” file, and then click “Command Prompt”.
    2. Type “sfc /scannow” in the Command Prompt window, and then press Enter.
    3. When see “the system scan will begin” and wait some time until the scan is finished, the scan will repair any missing or corrupt files.

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