Can’t install adobe flash plaer 10

I can download the adobe flash player 10 fine on firefox, but everytime I go and install it I get an error message saying:
“Error opening file C:\Windows\system32\MacroMed\Flash\NPSWF32.dll”
need help please
Answer #1
Try to download again….
Answer #2
I’ve tried to so many times and it still ends up with that message
Answer #3
Is work flash player 9?
Answer #4
no its for flash player 10
Answer #5
Ok i know thet but does work Flash player 9 on your computer?
Answer #6
I used the unistaller to unistall all the older versions of flashplayer and then tried to install flash 10…
Answer #7
I install flash 10 over flash 9 and it work…..
Answer #8
see, I’m using windows vista…and I still try to download the flash player 10 from any site and I still get the same error message
Answer #9
I have a similar problem, after installing Flash 10 and rebooting Opera, an error accurred and Opera shuts down… now I don`t have Flash and I can`t find older versions to download :/