System32 folder opens on startup XP
System32 Folder Opens When Logging on to Windows XP, Windows 2000, or Windows NT 4.0
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This article was previously published under Q170086
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
When you log on to Microsoft Windows, a Microsoft Windows Explorer window may open that displays the contents of the System32 folder.
This behavior also occurs if there is a String value that contains only a single quote character (") as the Value data in the following Registry key:
This behavior can occur if a null, incomplete, or damaged entry exists in the registry.
WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
Use Registry Editor to view the following two Windows registry keys:
Verify that all the values in these keys do not contain any incorrect, incomplete, or null entries (such as "").
An incorrect entry in the following registry value has been confirmed to cause the behavior described above:
Value: ActiveMovie File Extensions
Value Type: REG_SZ
Value Data: ActMovie.exe /Check
If the value data for this entry is null or appears in Registry Editor as quotation marks, you may experience the problem described above. To correct the problem, change the value data to match the entry above or delete the ActiveMovie File Extensions value.
This behavior can also occur if the Reminder value that has "" next to it is in the following registry key:
You can resolve this behavior by deleting the Remainder value.
If you are uncertain whether an entry is incorrect or incomplete, you may want to delete all entries other than the default Windows entry. The following entry to run the System Tray is the only required Windows default entry:
Value Type: REG_SZ
Value Data: SysTray.exe