Posted this some days ago in the tutorial section, but obviously it's not accepted, I don't knoww, so my second attempt here, hope it's ok to post it here.

Finally found a way to get rid of the stupid ActiveX-warning when ActiveX-plugins (Flash) are disabled in Internet Explorer! Those who need it, know what I'm talking about. Let me say one thing first: I HATE Flash, I really do. Well and I LIKE Internet Explorer, I want to use Internet Explorer without Flash. This little workaround is for people who want to use Internet Explorer without Flash, and not for happy Firefox users with their nice flashblocker, alright.

In Internet Explorer, when you disable ActiveX-Plugins, you get an extremely annoying window everytime a flash-file is found, something like "Your current security settings prohibit running ActiveX controls on this page. As a result, the page may not display correctly, blah bla blah ...". If you look through the Microsoft Knowledge Base, this silly pop-up cannot be disabled! I've been searching for a solution for a long time, and now I finally found this, tested with Windows XP, guess it works with other Windows version in the same way. Here it comes:

1. Get yourself a resource editor, like "Resource Hacker": http://www.angusj.com/resourcehacker/
2. Search for the file "shdoclc.dll", usually located in c:\windows\system32\ or c:\winnt\system32\
3. Load shdoclc.dll in Resource Hacker, go to "String Table" and go to element #503
4. In the right window you now see some of the IE alerts, simply delete the line 8033 !!!
5. Click on "Compile Script"
6. Save as shdoclc.dll in a different directory
7. Replace the old versions in ..\system32\ AND in ..\system32\dllcache\ with your new one, if necessary in safemode.

That's all. You will never ever see the stupid pop-up again. 

GreetingZ to all happy IE Users