I responded to a number of emails greatest asking for access codes to uCertify. Please get signed up and join the correct class period if you have not done so yet.
If you are having trouble with Paint 3D please try a different computer first. If that doesn't work you have permission today to use my computers in the back of the room. They should have Paint 3D installed on them.
If you still can't get it working please let me know via email. When I come back on Monday I will help students fix any issues they have encountered.