MTA SA not loading in Windows 7 Pro VirtualBox

[Backsage]

Hi everyone. I'm running into an issue here. Well, I installed VirtualBox. I got the network folders set up so I could copy and paste the GTA SA from the host to the guest. After installing MTA SA 5.2 in the guest, and after getting those error messages about not having anti-virus (which I did install from the Help link), I try starting MTA SA and it'll show the MTA SA "Stop playing with yourself" message, but then after a couple of moments, it'll say "GTA: San Andreas may have not started up correctly. Do you want to terminate the process?" I click no. Then while looking at the Task Manager, I notice that after a couple of moments, MTASA.exe and gtasa.exe will disappear from the processes.

Edit: After getting Avast, AVG, Malwarebytes, and MSE and making sure everything was up to date, I restarted the Virtual PC. Then went back to start MTA again. It'll show the "Stop playing with yourself" message, but after a few moments, it goes away and the MTA SA Launcher and gtasa.exe go away in the processes. So I don't know what's going on.

Edit 2: Ok. Tried reinstalling Windows again. I didn't install any anti-virus yet. But I tried opening up single player, but the processes went away in Task Manager.

Edit 3: I was able to enable Direct 3D through Guest Additions by clicking the D: Drive in Safe Mode. But I still get the same problems with it disappearing in Task Manager. Also, I found that by enabling 3D Acceleration in Settings > Storage, it ended up making my VM not work.

Edit 4: I was able to get Single Player and MTA to work in VMware from here: https://forum.multitheftauto.com/viewtopic.php?f=91&t=31891 3D Acceleration was activated in VMware. For some reason, I was not able to get 3D Acceleration to work in VirtualBox. Maybe I needed another OS like Windows 7 Home Basic? Because that's what I'm using in VMware (13/02/2016). It's kinda laggy, but it's better than not working at all.