Vista - World of Warcraft / d3d9.dll probs

Hi guys I am really starting to pull my hair out with this one, i recently updated WOW to the pre "Wrath of the Lich King" patch and i went to run the program and it has suddenly stopped working with the error message "error - d3d9.dll is either an invalid win32 application or is corrupt" other programs have been flagging this up also but when i try and run the lastest dx patch it tells me i am up-to-date and if i try and copy a new d3d9.dll file into windows/system32 folder it tells me i do not have the rights.

Please help, all suggestions welcomed!

Hi Raiyne,

It happens that fieseler another member here knew a way to allow the latest DX Redist to reinstall just yesterday

If you type regedit into the start menu search box & open it then go to:

HKEY_LOCAL_MACHINE\Software\Microsoft

Find & right click the 'DirectX' folder on the left pane & click export, save it as directxreg_backup or something. Then delete the DirectX folder (do not delete it without backing it up first)

Now go to C:\windows\system32 & scroll through all the files until you find ones with names like d3d9.dll, d3d10.dll. The ones you need to look for specifically should be labelled d3dx9_xx.dll (where xx is a number)

Now you need to delete all d3dx files from d3dx9_24.dll to d3dx10_39.dll. Dont worrry about deleting the directx10 files, they do come bundled in the installer

Then use the directx end user installer to reinstall directx

http://www.microsoft.com/downloads/d...DisplayLang=en

Let us know how it turns out and give him a thanks here: How to uninstall DX9 from Vista

Steven