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Zyxel wifi client utility falls prey to 'Illegal DLL relocation' XP bug

Here at PCW we're in the process of reviewing a Zyxel draft-N wireless router and Cardbus (NWD-170N) adapter, but despite having no problems with the router have been stymied when trying to install the client utility for the Cardbus adapter in Windows XP. An odd error message pops up to say :

The system DLL user32.dll was relocated in memory. The application will not run properly. The relocation occurred because the DLL C:\Windows\System32\Hhctrl.ocx occupied an address range reserved for Windows system DLLs. The vendor supplying the DLL should be contacted for a new DLL.

It turns out this is a recent known problem that can appear after installing a critical security update from Microsoft. Go to the MS Knowledge Base and download the hotfix, and all will be well. Several other apps are reportedly affected, so if you've seen this error the hotfix should help you out. It worked fine for us.

Posted by Kelvyn Taylor on May 7, 2007 | Permalink

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