Python & Visual Studio?
No, I don’t require either of those.
Installed the package before?
Yes, I have previously been using packages with no errors whatsoever until now. From version 0.209 or so onwards I have been using vim-mode, ex-mode, and more recently as of 1.0 I started using minimap, minimap-find-and-replace, minimap-selection, and a number of UI theme and Syntax theme packages.
Am I running as Administrator?
No, I escalate privileges to install applications as a local administrator if required, but Atom install was done without thoes permissions and had no visible errors during the install process.
In regards to trying to get a “clean install” for 1.0.3 and reinstalling 1.0.2, I deleted directories C:\Users\user\.atom and C:\Users\user\AppData\Local\atom each time, but this hasn’t helped.
If there is something else I can try to clean up the install and start again, please let me know.