I assume you mean to log into Windows with an admin account. I have done this and I have the same problem as the OP. I have done what you said and contacted tech support for
WM Recorder as there was no support page for splitter. I will post the resolution if/when it becomes available.
Background Info
I am running Vista32 with 4G RAM. And splitter is v1.7.911.12. I followed the user's guide and it gets stuck on "now splitting the sequence" when trying to save/render the video clip. File format is asf.