You always knew that it was probably risky loading Windows onto a Mac. And you were right.
But if you upgrade to VMWare Fusion 2.0.4 you should be OK.
Your local IT department may be able to support that version soon.
However, a recently-discovered bug in many versions of VMware’s virtualization programs—including VMware Fusion—breaks down this protective barrier. Kostya Kortchinsky, an exploit researcher at Immunity, discovered the bug, and wrote an exploit to demonstrate the problems it can cause. Basically, the bug allows a guest operating system (that’s the OS running inside the virtual machine) to execute code on the host operating system (the OS running the actual virtualization program).