{nav icon=home, name=Main Page > icon=wrench, name=Troubleshooting > System won't boot after upgrade} System won't boot after upgrade --- == Problem == System won't boot after upgrade, it hangs after successful unlock of the disk encryption, Purism logo is displayed. Pressing ESC key only black screen with //cryptsetup (sda5_crypt): set up successfully// in the upper left corner appears. == Solution == This can happen when system upgrade was interrupted or otherwise unsuccessful. Follow these steps to fix this: 1. Press {key Ctrl+F2} to open another virtual terminal 2. Login by entering your username (press {key ENTER} afterwards) and then enter your password (press {key ENTER} to login) 3. Run the following command: {icon terminal}`sudo dpkg --configure -a` 4. When the above command finishes, run the [[Recommendations/Upgrading packages | command to upgrade your system again]]: {icon terminal}`sudo apt full-upgrade`