Not very likely an update causing this - that sounds more like, kernel..
@Madrus Welcome! 
When booting, do you get a Grub boot menu on the screen? If so - don't boot the first option, select Advanced options for Zorin in the list, then select the previously installed kernel, but not the (Recovery) option. If you are able to boot normally, that kernel needs to be 'locked into place', so to speak, so it won't be updated again causing the issues.
Here's an example (random pic from the archives):
Then select the second option in the list, then you'll get (another random pic, this time Ubuntu):
The 3.2.0-40-generic is the firs tboot option Grub will load by default - same as with Zorin. After getting to this menu, just select a lower version kernel than what's being loaded by default, then test - if that works, then your new kernel is the issue.