Once it restarts, press the F4 key, and when it restarts you will be in safe mode. For example, you could write both to stdout: import sys Write ProgressBar to stdout bar ProgressBar (start0, maxvallen (data), fdsys.stdout) i 0 for d in data :: Some computation i + 1 bar.update (i) bar.finish () However, if you insist on using both, it's been recommended to wait 200 milliseconds for the next output or it may break. Then click troubleshoot, advanced options, start-up settings, restart. Before you click 'restart', hold down the shift key until the next screen is displayed (blue). Incase you arent familiar with how to access safe mode on windows 10, heres how: You press ctrl+alt+delete, and in the bottom right hand corner you click the power button. Now I'm sure you all know how to uninstall software on your PCs but it may not work in normal mode with the critical error as it didn't with me. I uninstalled the software and upon reboot my start button and cortana were working perfectly again.
Do those dealing with this problem have avast antivirus installed? If so, I believe that is what is causing the 'critical error'.