I have run into what appears to be a software conflict between 8start and Bentley Microstation XM Edition. If I have 8start running while trying to use Microstation it causes my mouse movements in Microstation to become extremely laggy and the cursor will trail behind my mouse movements. If I shutdown 8Start the speed problem immediately goes away.
Of course Bentley just says we don't support the 8start software and won't do any investigation into the issue on their side.
I'm not sure if you care enough to pursue it yourself, but in case you do here is a link to the software that I am referring to:
http://www.bentley.com/en-US/Products/M ... n/Main.htm