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I have wmplayer 9.00.00.4507 on one computer (comp more)

and wmplayer 9.00.00.3349 on another. (comp less)

I'd like to put wmplayer ...4507 on "comp less".

I don't want to upgrade to wmplayer 10, if I can avoid it. no great reason but I just want to make the small upgrade of wmplayer. from ...3349 to ...4507

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Is there any practical reason why you want to do this? The changes between these versions will be extremely negligible, consisting of maybe a few small bugfixes at best. –  Connor W May 5 '11 at 21:35
    
@Connor W No practical reason other than it's potentially useful if there's more than a bug fix or if the bug affects me. I may not want the very latest version. And could a slightly later version contain a newer codec? I did try playing a video that worked on the newer one but the older one said error downloading codec. –  barlop May 5 '11 at 21:51
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It should be sufficient to copy C:\Program Files\Windows Media Player over to the other computer.

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when I move the current one into a subdirectory called old, the files reappear. –  barlop May 5 '11 at 22:23
    
also when I try running the copy from a separate directory on"comp less", it displays the old version, and on "comp more" it displays the new version. So it changes nothing. –  barlop May 6 '11 at 8:17
    
@barlop: You need to replace it, or it will look up the old files. You might want to check what other DLLs that Windows Media Player uses with a tool like Process Explorer to carry them over too. –  Tom Wijsman May 6 '11 at 8:41
    
How does that work - how is it looking up the old files when I run the new one? i suppose it is running the new exe but perhaps the old other files since those are in the standard media player directory . Let's say I replace. So running new or trying to run new, from the media player directory. The old files seem to be in dllcache or something too. How do you know that if I replace it I won't still get the old files copied over automatically from dllcache? –  barlop May 6 '11 at 8:59
    
Either disable WFP or replace them in the dllcache to prevent that behavior. –  Tom Wijsman May 6 '11 at 9:30
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