﻿id,summary,reporter,owner,description,type,status,component,version,resolution,keywords,cc,guest,host
13803,"fresh install, getting critical/fatal error",andrecs50,,"Thank you for your time!

I am Installing CS50 appliance using virtualbox, just installed virtual box but when i try to open the CS50 appliance I get: ""A critical error has occurred while running the virtual machine and the machine execution has been stopped."" 

When I re-start it, i get a pop-up page asking me to boot either Ubuntu, advanced options for Ubuntu, memory test (memtest86+), or  memory test (memtest86+, serial console 115200).

I tried booting Ubuntu, but it sends me the same ""critical error"" message as before. When I close that window, i can catch another pop-up below it just for a second saying: ""fatal error... the guest is trying to switch to the PAE mode which is currently disabled...""

I do not want to start following instructions not meant for the user, since I have very little experience with computers (just starting) and I dont want to make it worst. Files attached for reference",defect,closed,other,VirtualBox 4.3.20,invalid,critical error,,other,other
