That message tells us what it tells you: pretty much nothing. Something changed on your computer and we can't tell you what. It's possible the asp.net framework got corrupted - EW needs that in order to operate. Reinstalling EW (last and free version here:
https://www.microsoft.com/en-us/download/details.aspx?id=36179 ) rarely fixes anything, but you could try it, while repairing the asp.net framework sometimes has fixed problems - but
that's tricky to do in Win 10. The net framework repair tool from Microsoft (https://www.microsoft.com/en-us/download/details.aspx?id=30135 ) doesn't include Win10 in its
supported operating systems.
And, of course, it's possible something completely unrelated is causing the problem: failing hardware or other interfering software.