Want to re-install WMP9/10?

[4Dude]

Maybe you dont like the current WMP you have an want to Downgrade but get the annoying message you have a newer version??


Navigate to this key

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MediaPlayer\Setup\Installed Versions


and change the values of the 3 subkeys to whats listed below (This makes it look like you have wmp9 and can then re-install 9/10 if you want to)

"wmp.dll"=hex:00,00,09,00,a4,0b,00,00
"wmploc.dll"=hex:00,00,09,00,a4,0b,00,00
"wmplayer.exe"=hex:00,00,09,00,a4,0b,00,00

[zachdms]

That's not really effective - the edit you do above is for an internal player integrity check and is not consumed by WM setup. Your suggested edits would simply stop the player from working, since any deviance from the actual installed versions indicate to the player that something is wrong. Since the WMP10 installer will blast over newer file versions if you bypass the setup version checks (a factor of the out of band installer it uses), it is not in your best interest to bypass this check. As Process Explorer can point out for you, the checks are off of wmploc.dll and wmvcore.dll. But again, bypassing those version checks can and will cause bad things to happen, so probably you would want to accomplish your goals in a more productive fashion.