Then, you can restore the registry if a problem occurs. For added protection, back up the registry before you modify it. Therefore, make sure that you follow these steps carefully. However, serious problems might occur if you modify the registry incorrectly. Important This section, method, or task contains steps that tell you how to modify the registry. For more information about the differences between Regedit.exe and Regedt32.exe, click the following article number to view the article in the Microsoft Knowledge Base:ġ41377 Differences between Regedit.exe and Regedt32.exeĪdding Registry Subkeys or Adding and Changing Registry Values If you must use Regedt32.exe, you cannot use Registration Entries (.reg) files to modify the registry. Regedt32.exe is the primary Registry Editor for Windows NT 4.0 and Windows 2000.

For example, you cannot add or change REG_EXPAND_SZ or REG_MULTI_SZ values with Regedit.exe on a Windows NT 4.0-based or Windows 2000-based computer. You can use Regedit.exe to make some changes to the registry on a Windows NT 4.0-based or Windows 2000-based computer, but some changes require Regedt32.exe.

Importing Registration Entries (.reg) files is a feature of Regedit.exe and is not supported by Regedt32.exe. This article is intended for advanced users, administrators, and IT Professionals.

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