I'd like to have a zero-install, Windows, virtual machine environment.  In theory, this would let me run my OS and desktop environment on any Windows computer, without installing the VM software.

When running VirtualBox with a Windows XP client, I ran into a problem where it worked fine before I installed the Virtual Box Client Drivers, and then, any mouse movement resulted in the mouse pointer moving slowly down and to the right.  It turns out this is a known VirtualBox conflict with the SMS mouse driver. (SMS allows the Windows domain managers to manage your PC, including remote control.)

So I uninstalled SMS.  Problem NOT cured.

So I checked Device Manager.  SMS Mouse Driver does not appear.

1. Open a command prompt
2. set devmgr_show_nonpresent_devices=1
3. devmgmt.msc
4. In Device Manager, click View/Show Hidden Devices in the menu