Class Not Registered (0x80040154): Why the Usual Fix Fails

I have this problem on a game ,and when I want to open it up it says class not registerd, i tried your solution lots of times did not work...

I am receiving this Class Not Registered message when trying to run my income tax software after transferring to a new computer. Any suggestions?

For those who tried registering Quartz.dll and still face a "class not registered" problem, have you considered that there could be a different class in your system causing the error?

My question to the poster is how did you manage to trace your troubles back to Quartz.dll specifically?

Hopefully that will help me find my own unregistered class. Thank you:)

I am using download beast and kept getting "getting class not registered." Tried your solution and the problem was fixed immediately. Thanks

Tryed it 5 times but message still the same with "Absolute Sound recorder" and can not even quit the program besides the Ctr+Alt+Del????
Message keeps popping up?

I got the successful message but I still have the problem.

Man, thank ya! DirectShow and any codec was working correctly! This works as a charm, thank!

i am new at playing pc games but I don't even know where run is at. when i click on start run does not come up. what am i doing wrong??????

This does not work.

So easy. I've spent a couple of weeks trying to figure this problem out and you solved it in seconds. Thank you!

Thanks! Spent many hours trying to fix this until I finally ran across this tip!

Wow, worked like a charm in seconds...after hours of research and trying other suggestions to fix this problem, THANK YOU!!!

I came across this when I was trying to find a solution to my problem.

It looks like some of the people responding are merging regsvr32 and quartz.dll and mispelling regsvr32.

There is a space between regsvr32 and quartz.dll. Regsvr32 is an exe that registers dll's.

Hope this helps might not help the people that posted because they might have found other help but maybe the next individual that reads. If not, I tried :)

It did gave me quartz.dll succeeded but still am facing the same problem. What next???

Did not help. I just downloaded newest version of Movie Maker and updates, latest Direct X, ran registry tools, etc. Everything else is just fine, but cannot download from Sony HandyCam MiniDV without this error.

Thanks for trying.