Hi,
Host OS: Windows 7 Ultimate x64 on SSD system disk.
PC Specs: Intel Core i7 3770K on ASRock Z77 OC Formula with 16GB DDR3, GTX470
VirtualBox version: 4.3.12 r93733 with Extension Pack 4.3.12 r93733.
I've had a Windows 8.1 Pro x64 VM running on VBox 4.3 for a few days now with no issues at...