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MSCOMCTL.OCX is a Microsoft Library Windows Common Controls file. Occasionally when a Windows user is installing or uninstalling a bunch of software, certain Microsoft Libraries can become unregistered . One such file that can become corrupt or lost is the MSCOMCTL.OCX file. Then, when the user runs a program or application that requires or is dependent on this file, they may be presented with the following error:

Component 'MSCOMCTL.OCX' or one of its dependencies not correctly registered: a file is missing or invalid

MSCOMCTL.OCX error screenshot:

How to Correct or fix this dependency error:

1. First search your local drive for MSCOMCTL.OCX to see if it is missing. The path to the file is typically: C:\WINDOWS\system32 if you are running Windows XP
2. If the file is missing you can download it HERE
3. Once downloaded, click the MSCOMCTL.exe and extract the file to your C:\WINDOWS\system32 directory

Note: Some users may need to perform this additional step to register the file:

1. Click Start -> Run and type REGSVR32 MSCOMCTL.OCX