virtualbox.org

Computer System: HP with Intel 2 Quad CPU 8 GB, OS: Windows 10 64 bit
VirtualBox VM 5.0.12 r104815
Guest Additions installed
Host: Windows 10 64 bit, Host RAM: 8 GB, 6 GB available
VM: Windows 10 32 bit RamSize 3 GB

VB works fast with XP as VM,
but extremely slow with Windows 10 32 bit.
It takes tens of seconds to open any app.

Trying to speed up the VM I transferred the VM from the WD harddisk
to the SSD, but even this did not speed up the VM.

I'm only running VB with VM Windows 10 32 bit for the test.

There must be something wrong in the settings I use...

Looking through the different topics I found that the setting
for the number of cores could be the reason for a slow VM.
And yes: using 1 core instead of 2 cores did speed up the VM considerably!

attached: zip with .log & hardening.log

I see a lot of references to OPENGL32.dll in your VBoxHardening.log, as well as a barrage of "lacksWinVerifyTrust", but I would suspect that these would affect equally the XP and the W10 VMs. Well, actually not the OpenGL32, so see if disabling 3D acceleration changes anything.

From the VBox.log, I see a gazillion of "AHCI#0: Port 0 reset" messages. Don't know why. How's your hard drive doing these days? Do you have enabled the "Use host I/O cache"?

I have exactly the same problem with guest OSes including XP-32bit, and windows 7-32bit.
My PC hardware is identical to what is described above
attached is the log for the XP guest, you can see in the log:

00:00:31.252195 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices
00:00:31.515014 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices
00:00:31.707134 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices
00:00:31.841825 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices
00:00:31.965090 OHCI#0: Lagging too far behind, not trying to catch up anymore. Expect glitches with USB devices

socratis wrote:I see a lot of references to OPENGL32.dll in your VBoxHardening.log, as well as a barrage of "lacksWinVerifyTrust", but I would suspect that these would affect equally the XP and the W10 VMs. Well, actually not the OpenGL32, so see if disabling 3D acceleration changes anything.

From the VBox.log, I see a gazillion of "AHCI#0: Port 0 reset" messages. Don't know why. How's your hard drive doing these days? Do you have enabled the "Use host I/O cache"?

Thanks Socratis. The main enhancement of the speed was setting the number of Processors to 1 (instead of 2).
I also did disable 3D acceleration but did not see any more speeding up.
My harddrives should be doing very well, because I replaced them: Win10 64 bit and VB run on a SDD, also the
VM Win10 32 bit runs on the SDD. VM XP runs on a new WD 1 TB HD.
I also enabled 'Use host I/0 cache' but saw no more speeding up. But I did not see any more of the
Port 0 reset messages as well, so this did help!

I am having the same problem with Windows Vista 32/84: My Ubuntu 14.04 is running very slow in VirtualBox.

I would like to try following the advice given here of changing the number of processors/cores from 2 to 1.
But I don't know how to edit this setting in VirtualBox. Can anyone please explain how I do that?

Your "Ubuntu 14.04" running slow, is not the same as the title of the thread, is it? Start a new thread where you clearly describe your problem and provide some logs. For more information, please read: Minimum information needed for assistance.