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A re-install of the operating system may be needed if you need to uninstall Directx 9.

How can I uninstall Directx 9?

To the best of my knowledge you can't. Once installed, it becomes part of the operating system. If you need to uninstall then a Google search for "DirectX Uninstall" returns several hits, but I can't speak for their quality. Ultimately, the approach I would try would be be to re-install the operating system and then not install DirectX 9.

Update: Check out this article: "A Cabinet file cannot be trusted" - Why? for pointers to several resources concerning that apparently common DirectX-related issue.

Article C2077 - June 21, 2004 « »

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Leo Leo A. Notenboom has been playing with computers since he was required to take a programming class in 1976. An 18 year career as a programmer at Microsoft soon followed. After "retiring" in 2001, Leo started Ask Leo! in 2003 as a place for answers to common computer and technical questions. More about Leo.

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Recent Comments
195 Comments
salem80
April 25, 2009 1:15 PM

After i install directx_aug2008_redis
i can't start 3DMark at anyway the program freeze before start..
i can't back to previous version of directx..

john
September 22, 2009 4:09 AM

hey, this way of deleting is extremely UNSAFE for window XP as i tested, u cant re-install ANY directx after u deleted your main directx from HKEY_local_machine, don't try it if you don't know what are you doing.

Bill
November 7, 2009 3:15 AM

I got an error message when I started Modern Warfare - World At War, stating there was an unrecoverable error with DIrectX. I'd previously played this game ok. I tried starting the game a few times, with the same error. Since that didn't work, I downloaded the latest version of DirectX (just in case). Tried to install it, but eceived message that it wouldn't install, as I already had the latest version. Fullishly, after checking on Google, I followed instructions to delete DirectX from my Registry (stupidly, I didn't make a copy first). No matter what I do, I can't install DirectX. I've even tried loading my XP disc, but get told my current operating system is newer ! Any suggestions ?

msm
December 20, 2009 5:32 PM

hi i install directx 9. but my multimedia Advertising on msn.com do not work. before it work with ie6 but when i install ie8 it do not work at all. i have xp sp3. why.

o_kakos_manolis
June 6, 2010 1:50 AM

my dx diagnose tool says that the version of dx is not found

is that a problem and how do i correct it ??