Afternoon all, I’ve been installing a 3rd party product which requires a dll registered in windows. Normally I’d move the file to c:\windows\system32 and then run regsvr32 ‘filename’  and all would be well, not so in Windows 7 64bit, I receive this error:

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So quick and simple, you need to move the dll to the c:\windows\syswow64 folder and run:
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regsvr32 c:\windows\syswow54\filename.dll

Once I’d done this the file registered perfectly:
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Hope this gets you out of a sticky quibble.