MuseScore 3 Crashes on Splash Screen (MuseScore3.exe is not responding)

I updated to MuseScore 3 about a week ago. It ran fine for a few days. I'm running Windows 7 on my PC.

I was working on a song and I went to go use the page layout drop-down list when MuseScore3 crashed horribly. It hasn't been able to open since.
Every time I try to open it now, it will hang on the splash screen indefinitely. The program icon doesn't even show up on the taskbar. This also happens when I go directly to opening a score.
(NOTE: I have already uninstalled multiple times, to no avail. Not even restoring to factory settings helps. I have also disabled my firewall.)
It should also be noted that the "QtWebEngine.exe" process does not end after I terminate MuseScore.
What do I do?

Update: I have installed MuseScore 3 Alpha. It worked until I tried opening a new file. Then, MuseScore 3 Alpha gets caught in the same error loop as before.

Computer specs:

System HP p7-1207c (all builds)
Motherboard PEGATRON 2ACD
Memory 2.1 GB free of 6 GB @ 1.3 GHz
Display 1920 x 1080 - 32 Bit colors
OS Windows 7 (64 Bit)
BIOS Date 20111216