"The memory could not be read" error on Windows 7 VM

I am using Oracle VirtualBox, the host machine is on Windows 10 and the guest machine is on Windows 7
When I was doing the initial installation process of Windows and an error acurred saying "The memoery could not be read"

Then the vm aborted, I ran it again and the installation continued normally, after that, I tried to install the guest additions, the installation wizard finished and asked me to reboot, I choosed the option "reboot now" and the same error ocurred again, this time I wrote down the error code:
"The instruction on 0x00007FFD6B70F2CC referenced memory on 0x0000000000000000 The memory could not be read"

What could be causing this?

This is the log from the vm
https:// pastebin.com/t0ksHXJ7

 

Thanks, that solved the error but I wanted to enable 3D acceleration to use windows aero transparency effects, then I guess it won't be possible right?