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When you open the Display Properties dialog box, either through Control Panel or by right-clicking the Microsoft Windows desktop and clicking Properties, the Web tab may be missing.
This behavior can occur if the DeskHtmlExt registry key is damaged or missing.
To resolve this issue, reinstall Windows on top of your existing installation. To do so, type a command line in the Run dialog box (on the Start menu), and use switches to rebuild your system files without affecting hardware settings and schemes.
For additional information about Windows Setup switches, click the article number below to view the article in the Microsoft Knowledge Base:
186111 Description of the Windows 95, Windows 98, and Windows Me Setup Switches
The DeskHtmlExt registry key controls the existence of the Web tab, and it can be found in the following location: