Chalk my last remark up to impatience. It appears that greg’s solution does work.
If it still is a problem for anyone else here’s a detailed solution:
In Internet Explorer click “Tools”, then “Internet Options..." Then Click the “Security” tab. Click “Custom Level” and under any of the “ActiveX” options choose “Enable”
Next open up WMP and play one of the files that is giving you these codec 75 error messages. Then go to the bathroom, read a book, have a snack or whatever until you are able to use WMP again. When you get back, close WMP and repeat the instructions in this paragraph until the file plays.
It might take a few trys, so be patient, and let WMP do all the work.
DO NOT CTRL+ALT+DEL if WMP stops responding, it will eventually start responding again. You just need to be more patient than I was.
I have checked about 50 video files that have been giving me troubles and all of them are working now!
So anyways, thanks greg. The problem wasn’t nearly as “simple” as you made it sound if I had to wait months to find a solution, but it did work out in the end.
audio codec 75
Weird but running mplayer2 allowing it to download the codec and then using media player 9 or above worked... dam microsoft and thier faulty program!
ok, guys... greg’s solution is the best one, but to quikly install codec put your Security settings at the lowest level, just to download and install that damn codec 75.
After that, restore WMP default security settings or what you had before.
It works!
John75!
You ROCK dude!!
That solution was awesome.
Thanks!!
Yeah Gregs one works but if you try John’s one you’ll find out how Greg came by his solution.
Stir, Stir, Stir
Cheers!!
Respected sir,
Where can I find codec 75 for windows media player
Binoy Jacob,
If you follow the suggestion I posted in my previous reply on this page Windows Media Player will download the codec for you.
I could not find the site of audio codec 75.Kindly specify the site.
Thanks in advance,
Binoy Jacob
I didn’t need to go to any site. Windows Media Player(WMP) found it, downloaded and installed it for me. If you’re running in Windows XP then it should do this for you too as long as you have your Internet Explorer security settings on Low.
Respected Sir,
Thank you very much.
At last I found out the solution for codec 75 with your help.
Thank you once again,
Binoy Jacob
Greg is right, change security settings and let it download.
I found that by lowering the internet security settings from control panel, to 'Low', i was given an option wether or not to install the codec. Click yes, and it works. 
Here,I found a very good site (if your player doesn’t download the codec automaticlly for you like my player...):
http://www.keystonelearning.com/company/faq/faq.asp?id=40 
i have downloaded a .asf movie and the windows media reproductor says something about a 75 codec, where do i find it?
john 75! you are my hero! (well not really i just really like you right now) i finally FINALLY got to watch my video that needed codec 75!
you guys rule thanx alot
please send to me codec 75
FOR ALL STILL NEEDING CODEC 75:
If you read through this message board in its entirity, and follow each of the suggestions given to you, at least one of them is sure to solve your problem.
http://www.keystonelearning.com/company/faq/faq.asp, type in 75 in the search field and scroll down to the audio 75 patch. It should fix the problem.
Codec 75. Internet Security to low and let it download. Perfect! Thanks guys. Here come the simpsons at last