virtualbox.org

Hi,

I'm using VirtualBox 4.2.6 on a Windows 8 host running a Windows Server 2012 guest. The guest always shows 100 % CPU utilization, and it's the VirtualBox Guest Additions Service that's eating up all CPU cycles averaging on 97-98 % if guest is left idle.

If I start using some application in the guest, it responds quickly and uses whatever it needs from the CPU.

The same behaviour existed in 4.2.4 and isn't really a big problem but strange even so.

Brgds

Jonas

I don't know if It's related, but I just booted my VM of an evaluation copy of windows server 2012. I hadn't booted it in at least a month.

At first it was fine but I had 20 updates to apply and reboot. then it started freezing on boot with the windows logo and using 100 percent cpu.

I did 2 resets and it started automated repair.

Now it's still hanging on the boot logo but only using about 18 percent cpu (on a quad core system)

My point is that I wonder if it was some update that caused the problem. oh well, I might just reinstall it, if thats possible with the eval license.

-Jason

Update: I also have the same configuration as you: W8x64 host, VB4.2.6, W2012 server guest. It is reverting the windows updates now so i might go through them one by one... that's always fun...

Update2: How many cores are you running on the guest? I dropped from 4 to 1 and that may have done something for my problem at least. that's not really a solution though.