Error 1603 when installing application


When you attempt to install an application, you get the Error 1603. Additional information included may be “A fatal error occurred during installation”.


This can be caused by having a large Temp folder.


Clear out the Temp folder:

Easy Solution

  1. Download and run DriveTidy.
  2. Check the “Temporary files” checkbox.
  3. Click the “Start Cleanup” button.
  4. Once the process has completed you can close the window and try installing again.

Manual Solution

  1. Press the Windows Key + R.
  2. Type cmd and press Enter to open the Command Prompt.
  3. Type del /f /s /q %tmp% and press Enter.
  4. Ignore any errors that appear. Once the text has stops scrolling, you can close the Command prompt and try again.

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