Cannot Install Adobe Flash

Hi MajorGeeks! :wave
I was recently prompted by a legitimate website that in order to run a player function, I would have to update Adobe Flash. I tried to update, but that failed. So I uninstalled it entirely and tried a clean install. That has failed due to a permissions issue regarding a particular registry file. I tried running as Administrator, but that resulted in the exact same error message. I must also note that during the past two weeks I have been getting prompted by Adobe Flash to update, but did not do so due to lack of time. I am attaching a screenshot of the error box I am getting. Please assist me with any suggestions you have. Thank you.

I am running Windows 7 Home Edition and using FireFox 3.6.12 as the Default Browser.

 

If Secunia PSI picks up Flash as being installed, it may be able to update it correctly (and update/offer to update many of your other apps, too).

 

Try to delete file NPSWF32.dll manually, if necessary using Unlocker, then run the installer again.

 

check and see if the brouser helper object is disabled ?
IE manage add ons

 

Is this a manual download of the Flash Player installer or is this via Adobes Download Manager?