whenever i try to download the studio i try to install it and it comes up with a message that says

"An error occurred during the installation of assembly
‘Microsoft.VC80.CRT, public Key Token=”1fc8b3b9a1e18e3b”, type= “win32”, version=”8.0.
50727.762”, process Architecture=”x86”.   Please refer to Help and support for more
 information." 

then it redoes what was installed and another message pops-up and says error installing firefox plugin.  i'm not sure what to do.  a little help would be appreciated.