The d2htools.dll file belongs to Doc-To-Help Hyperformance Tools by WexTech Systems, Inc.  A leading program in the industry, Doc-To-Help creates Windows help files out of Word Documents.  The program has been around for a long time and is now owned by ComponentOne.  This file may belong to an older version of Doc-To-Help, instead of the latest versions created by ComponentOne.  If so, it is possible this file isn’t needed on your machine, but the registry still has an entry for it.

The Windows registry is a database that contains entries on every part of every installed program on the machine.  When your computer starts up, it scans the registry to be ready when you open an application.  If some of the entries are wrong or outdated, the computer will show an error.  To keep your computer running nicely, you should regularly clean your registry with ZookaWare PC Cleaner, the registry cleaner.  We fix any errors and keep the registry tidy, so your computer runs efficiently, guaranteed.

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ZookaWare runs on Windows Vista, 7, 8 and 10. It has no ads, popups or bundled software and fully uninstalls by clicking Start > All Programs > select ZookaWare and click Uninstall.

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