Monthly Archives: December 2014

CS50 Lecture by Steve Ballmer

Steve Ballmer gives a great lecture at Harvard:

Update: I actually met him in ProClub locker room in Bellevue right before Christmas. It was a little surprising to see him there but I’ve heard from friends that you see him there often. So I just commented that his lecture was really good especially the aspects about luck and being hardcore. He was flattered and simply hi-fived me 🙂

Unable to open TWAIN source

This post is a deviation from my general blog theme, but I simply had to post it.

Issue: my Canon LiDE 25 scanner was working for several years on Windows 7 x64 English Pro but suddenly started to show error “Unable to open TWAIN source Please check connection Then re-start Toolbox”


Solution: add C:\Windows\twain_32\CNQL25 to PATH environment variable.  Problem solved!