You might want to check and see if your OS is up to date as well. I only say this because just a little bit ago, maybe half an hour or so, I decided to use Chrome for something and it just wouldn't respond at all- none of the apps or extensions would load, couldn't open the settings menu- all I could do was open and close tabs/windows... I happened to notice that my OS (Win 8.1) was wanting to do a restart to finish updates. Did the restart and now Chrome is purring along. They should be independent of each other, but with how programs are integrating with the OS so much these days...