Issue with Quartus downloading ModelSim_SetUp and Spontaneous Freezing

Hello,

Recently I have been having problems with Quartus where if I attempt to create a symbol file for a current file while my design schematic is open, displayed, and set as a top-level entity, the entire Quartus program will freeze and will not do anything else until I quit it. I have waited to see if anything would happen but to no avail. Also, I don't even get another window telling me what the issue is, just a complete freezing of the system. Is there any way this can be resolved, because it seems that it only happens when I try to perform that one function ("Create a symbol file for a current file")?

My other issue is that I cannot, for some reason, download a file called ModelSim_SetUp which is necessary for me to run simulations. I click on the link and it'll sometimes open another window that will then briefly close and that's it. No download pop-up, nothing. Is there something wrong with my browser that could be causing this issue, or maybe something else (I use Google Chrome by the way)?

Thank you!