If any new fonts were added to the machine, it can take significant time for the Inkscape window to appear, especially if the machine is older/slower. After Inkscape has rebuilt its font directory, it should restart normally. Any new software installed on the machine could also install a new font, ...

Did you upgrade to the Windows next version preview that came out recently - creators or something? You can check in your update logs. Also when you reinstalled did you uninstall first? did you delete your inkscape folder from your users folder first? I use Windows 8. There was an update recently, ...

I have no idea why, but now all of the sudden, Inkscape no longer opens... sorta. I double-click to open it, wait a bit... and nothing happens. So, I opened up Task Manager to see if it shows up, and it does in "Background Processes." Can't do anything else but close it. I've tried restart...