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I run Windows 7 Professional guest on Windows XP Professional Host (both of them are 32bit). I installed Guest Additions in the guest in safe mode with full D3D Support.
When the "Aero" effect must start I have a problem. The VB Crashes and i have this error:
The instruction at "0x7c9127d9" referenced memory at "0xffffffff8". The memory cloud not be "read".
The Ram is setted to something around 950MB and the Video RAM is 256MB. There are 2048MB RAM memory on the Host machine. I use the newest version of VirtualBox.

noteirak wrote:Minimum information needed for assistance.

Repaired.

00:00:07.456935 Host RAM: 2037MB total, 1387MB available
00:00:07.837247 RamSize <integer> = 0x000000003d400000 (1 027 604 480, 980 MB)
00:00:07.837976 VRamSize <integer> = 0x0000000010000000 (268 435 456, 256 MB)

You're overcomiting your host memory, if all the memory required is added (980+256+VM overhead).
Since Windows 7 will not run with less than 1GB RAM, you need to free up RAM before doing anything.

But to be honest ,your host doesn't seem strong enough to handle VMs right now: very low RAM and your CPU doesn't seem to handle Virtualization technologies.

noteirak wrote:

00:00:07.456935 Host RAM: 2037MB total, 1387MB available
00:00:07.837247 RamSize <integer> = 0x000000003d400000 (1 027 604 480, 980 MB)
00:00:07.837976 VRamSize <integer> = 0x0000000010000000 (268 435 456, 256 MB)

You're overcomiting your host memory, if all the memory required is added (980+256+VM overhead).
Since Windows 7 will not run with less than 1GB RAM, you need to free up RAM before doing anything.

But to be honest ,your host doesn't seem strong enough to handle VMs right now: very low RAM and your CPU doesn't seem to handle Virtualization technologies.

Old topic, but adding 1gb more ram fixed everything (and lighter OS ).