I have tried virtual box on my old laptop a few weeks ago and everything was working fine. I've installed it on my "new" computer, but I'm having issues.
First I've installed vbox 7 (latest version), I ran ubuntu installation, and it was working fine. After I shut down my (host/actual) computer, I could not start the ubuntu VM.
I uninstalled vbox 7 and deleted (I think) everything associated with it. After that I installed vbox 6, hoping it would resolve the problem.
Again I installed ubuntu, it was working fine, untill I shut down my PC. The same problem occured, I can no longer run the the ubuntu VM.
I disabled hyper-v, disabled WSL, task manager - virtualization is enabled, restarted the PC a bunch of times...
This is the error I am getting:
Attaching VBox.log (first log file on the left (44-18))Failed to open a session for the virtual machine ububu.
The VM session was closed before any attempt to power it on.
Result Code: E_FAIL (0x80004005)
Component: SessionMachine
Interface: ISession {c0447716-ff5a-4795-b57a-ecd5fffa18a4}
Attaching VBox.log.2 (last log file on the right(55-40))
Thank you for helping.
Edit
I've started vbox as admin, and now it works. The first time I started it I didn't run it as admin. Even though it's working I would still ask for clarification why this problem occured (is occuring / not working if not run as admin)