I'm using 64 bit Windows 7, I tried to download it on both Firefox and Google Chrome, I used the uninstaller on this site so I shouldn't have any current Flash installed.
When I go to try and install the new flash 10.1, it tells me....
"A required file (C:\Windows\SysWOW64\Macromed\Flash\NPSWF32.dll:5) could not be written due to insufficient permissions."
PS: I'm not entirely sure if I'm in the right forum, if not then I apologise and can you link me to the correct one?
I have a similar issue like this.
Go Here to the description:
Here the ticket in bugzilla: