Saw a post about this already but have not found it after several searches. My laptop will not install the 8.1 upgrade. It gets to the end and then I get a message:
...content.IE5\89MZWP2R\vegaspro81_x64[1].exe is not a valid Win32 application
I tried it at home and then at work with the same result
Can someone please suggest a possible solution?