Error 21 or DW021 while installing Photoshop CC 2015

Error 21 or DW021 installing Photoshop

When you try to install Photoshop CC 2015 on Windows, you get Error 21 or ERROR: DW021 in install logs.

Solution

1. Run the Creative Cloud Desktop uninstaller

2. Rename the following folder:

C:\Program Files (x86)\Common Files\Adobe\OOBE\PDApp

to

C:\Program Files (x86)\Common Files\Adobe\OOBE\PDApp_old

3. Install the latest version of the Adobe Creative Cloud desktop app.

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