Here's the crash report from Windows (not sure how helpful it will be):
Problem signature: Problem Event Name: APPCRASH Application Name: VirtualBox.exe Application Version: 4.2.4.0 Application Timestamp: 508ac1cf Fault Module Name: MSVCR100.dll Fault Module Version: 10.0.40219.1 Fault Module Timestamp: 4d5f034a Exception Code: c0000005 Exception Offset: 000000000003c1b0 OS Version: 6.1.7601.2.1.0.768.3 Locale ID: 1033 Additional Information 1: 9f04 Additional Information 2: 9f046046f0bb306991d764ce2ad02404 Additional Information 3: 6f05 Additional Information 4: 6f05b8f4e0326d934ae2215b29427b1aHere's my Host system info:
CPU: Intel Core i7-3820QM @ 2.7GHz
RAM: 16.0GB
OS: Windows 7 Home Premium (64-bit)
Hardware: Sony Vaio E15112FXS (brand new) - Virtualization enabled in BIOS
The problem occurs with Ubuntu 12.04, Ubuntu 12.10 x64, Xubuntu 12.10 x64, Lubuntu 32-bit, et al. I've configured each VM with a 20+ GB hard drive and 1-2 GB RAM. Oddly enough, the problem did NOT occur with Ubuntu Server 12.04, Pinguy OS, Zorin OS, or Bodhi OS..