I can't install SGP on my new ACER desktop running Windows 8 64 Bit.
I sent a screen shot of the error message to the SGP developer and his reply is attached with the error message.
As you can see, not very helpful at all. I have tried - again and again - to install newly downloaded files and also the Beta. No luck. Same message.
I worry that this is seen as a rare and difficult problem so it will be left alone by SGP. I hope not but their response, as I said, is disappointing to say the least.