Use either the hideously overpriced Adobe Acrobat, which is currently available on a one month free trial with annoying popups that manage to appear even when you are not using the software.
…Or use CutePDF Professional, cheaper and also available on trial.
Follow the windows tip of using diruse. click
Turns out a hidden folder called C:\WINDOWS\Installer contained 21GB of data, used for uninstalling and repairing installed programs. Most of this data appears to be either duplicated or from software that didnt unstall correctly. It is not safe to delete this data, so I downloaded the Windows Installer CleanUp Utility tool as recomended.
It turns out that the tool itself dosn’t help, but comes bundled with an unsupported command line utility called MsiZap.exe which can remove orphaned files.
Usage
C:\Programme\Windows Installer Clean Up\MsiZap.exe G
This deleted 99% of the data without affecting anything else. I now have around 400mb of data in the installer directory which shounds about right.
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