For two months I've been running Ubuntu 11.10 64bits in VirtualBox 4.1.12r77245 but today everything has been really slow, freezing all the time. I've had to restart the VM about 7 times already because Ubuntu just freezed in the middle of a task. I'm using my laptop, it's a LG P420 i5 with 4gb ram. I don't know if it could be an update of Ubuntu or VB, but I really need it to work. Any guesses? Thanks in advance