Preface: I have a Lenovo T510 laptop running windows 7, 4 GB RAM, 500 GB 7200 RPM hard drive. I have two Windows XP virtual machines on it, one for my use, one for logging into a customer's VPN, but on their own partitions. The laptop is running Forefront Client security and the virtuals are running MSE. Issue: Sometimes, for a not-yet discovered reason, clicking a program on my virtual machine will cause the physical hard drive to be accessed like crazy for up to a minute. The virtual machine pretty much freezes during this period. When I pull up task manager in windows 7, there is still some physical memory labeled as "free" and I keep the hard drive(s) pretty well defragmented with Auslogics. I have Windows 7 and the virtuals set to a basic color scheme and disabled as many unneeded processes as possible on the VMs, but the issue persists. I upgraded both VMs from 512 MB of usable memory to 768, but that didn't seem to help much. Later this year I will be getting a new Lenovo with 8 GB of RAM, so that could very well resolve the issue. Just wondering if you guys knew of something else I could try for the time being.