For future saves, compression can be disabled on a per-file basis using the following steps:
- Click the Office Button, and then click Save As.
- Click Tools, and then click Compress Pictures.
- Click Options.
- Click to clear the Automatically perform basic compression on save check box.
- Click OK.
- In the Compress Pictures dialog box, click Cancel.
Note: Clicking OK on this dialog will not prevent the issue from occurring.
You can also modify the following registry setting to prevent basic compression from occurring by default.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.
Quit all applications.
Start the registry editor. To do this, click Start, click Run, type regedit in the Open box, and then click OK.
Browse to the following registry key:
Create a new DWORD value named AutomaticPictureCompressionDefault.
Make sure the value for the registry key is set to 0.
Close the registry editor.