My STXL-1102 gives a strange looking frame (see attached file) only when connected to a Lenovo T61 notebook running Windows 8.1. The same notebook worked fine with the same camera for over a year and still does so when connected to my ST-10 or an STT-8300. The STXL-11002 behaves normally on two other notebooks. When I use the Ethernet connection instead of the usual USB, imaging works, but guiding gets interrupted after three cycles. Any ideas what may cause these problems?