Yes, I was thinking the same thing! First, it took forever for support to start chatting and second Kimberley was what seemed like way to quick to answer that she didn't think windows 8.1 was compatible with Cleo's. Then she said she would report it to tech support. When downloading I click download casino and hit run. Everything runs smoothly. I accept the terms, etc. Then the software opens up to download and as fast as it opens a generic grey ERROR box pops up. It does not tell you what the error is or give a code. You only have the option to hit okay and then it closes out. After attempting to download Cleo's the shortcut is installed on my computer so when I click it I get the following error message.After it searches for the shortcut the error message changes to this error message. This is the same exact thing that was happening when I had windows XP. I don't know anyway around it and was actually relieved when Kimberley told me Cleo's was not compatible with my computer.