Downloaded the software to desktop. Tried running from desktop. Only thing that happened was a symbol in the middle of the screen with the word Affinity and three symbols - the last the close one. Running Windows 10. Dell Laptop with C:\ as SSD and D:\ a HD. Tried rebooting, and then trying to run again - nothing happened apart from above. Tried running as administrator - again nothing. No listing of Serif or Affinity in the programme listing on the Control Panel. No folders for Serif or Affinity in the two Programme folders on the C:\.
Hope that this helps.
