Unable to install any Linux guest

[ausmausch]

Hi,

I'm not able to install any Linux-guest on my Windows10-host. I can open and navigate without problems, but the problems come with the installation-process.

I tried following systems:
ArchLinux: Installation-errors on multiple packages
elementaryOS: Demaged installation-medium, also I'm unable to use the keyboard (also the Soft-Keyboard)
Kubuntu: same errorcode as ElementaryOS, but the keyboard works normal
OpenSuse: Error: [Subprocess failed. Error: RPM failed: package cracklib-dict-full(...) does not verify] ; [Error: RPM failed: unpacking of achrive failed on file ...] ; [install failed] -> Error shows up multiple times.

Because not a single installation worked I think a setting on Windows or VirtualBox is faulty. Also the checksums after the downloads had no mistakes.
I've tried turn on/off of HyperV, without any changes.

Has somebody faced similar issues?
Thanks for answers!

[scottgus1]

Please right-click the guest in the main Virtualbox window's guest list, choose Show Log.

Search the far left tab's log for this text:

Attempting fall back to NEM

If you find it, Hyper-V is enabled and needs to be disabled. See HMR3Init: Attempting fall back to NEM (Hyper-V is active). (The new test builds might have a fix for this problem. If you try a test build and it works, report here: viewtopic.php?f=6&t=90853, and save the installer file.)

If you don't find that text, save the far left tab's log, zip the log file, and post the zip file, using the forum's Upload Attachment tab.