id summary reporter owner description type status component version resolution keywords cc guest host 6152 Pauses on Ubuntu 64 host (SetSystemTimeAdjustment => ERROR_PRIVILEGE_NOT_HELD?) Charlie "Hi I have been using VirtualBox for a few years now on an Ubuntu host with an XP guest OS. Recently, I installed a Vista (Home Premium 32) guest, but have run into a problem. Approximately every 10 seconds, I see a pause for about 2 sec. This seems to affect the whole guest OS- mouse animations, video pauses etc. I have installed guest additions, but I saw this problem before doing that- and before installation, the pause would even affect mouse cursor movement. I then rebooted into the XP VM, and see that the effect is present there, too. It does seem to be a bit less pronounced there, though. I've attached a screenshot with my settings. I have had a good old fiddle with them, to no good effect. Also attached is a log from the Vista VM. I can't find much about pauses from googling or searching this site, but apologies if I've missed something. If there's any more information I need to include, please let me know, I'll be happy to do so. Cheers Charlie My PC Specs: Ubuntu 9.10 64 Acer 5920G, Intel C2D T7300 4 GB RAM NVidia 8600M" defect closed other VirtualBox 3.1.2 obsolete pause,performance Windows Linux