I had 3 versions of FF and had to redo the HD and now no version will install says "Can't open output file" i have winddows 7 64 bit 8 GB memory and 1T HD but i have it on my other desktop and laptop with less memory and HD space and works fine laptop has windows 7 64 bit and other desktop hook to my 32" tv has win 7 32-bit i lso did clean removal of all versions of FF and did new DLs with screen shots of it DLing, complete of DL and after i got the error again.