You can view more details about the side by side error (SxS) here: https://forum.audacityteam.org/t/win7-x64-audacity-2-1-3-side-by-side-conflict-errors/45230/1 There is nothing you can do unless you wish to recompile Audacity or go back to Audacity 2.1.2.
However the computer crashing is almost certainly nothing to do with Audacity or the SxS issue, because Audacity does not have sufficient permissions to crash the computer. Computer crashes are almost always driver issues. WhoCrashed can be helpful in identifying the cause of the crash. Please see http://manual.audacityteam.org/man/faq_errors.html#reboot.
Gale