Image Export converts PowerPoint slides to high-quality images.
PPT2HTML exports HTML even from PowerPoint 2010 and 2013, gives you full control of PowerPoint HTML output, helps meet Section 508 accessibility requirements
Merge Excel data into PowerPoint presentations to create certificates, awards presentations, personalized presentations and more
Resize your presentations quickly and without distortion
Language Selector switches the text in your presentation from one language to another
FixLinks prevents broken links when you distribute PowerPoint presentations
Shape Styles brings styles to PowerPoint. Apply complex formatting with a single click.
Prep4PDF preserves interactivity in PowerPoint presentations when you convert to PDF
How to back up and restore the Windows registry
Some of the suggestions you'll find here and on other sites involve modifying the Windows registry.
Making the wrong changes to the registry can cause your programs or even Windows itself to stop working correctly.
It's wise to back up the registry before making any changes to it.
Microsoft explains how to do that in an article entitled How to back up and restore the registry in Windows
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