That sounds more like your PC's video card drivers need updating.
To display video on a PC screen there's a special mode the drivers use, called 'overlay mode' that allows very fast direct transfer of frame by frame pictures to a region on the screen without the operating system having to do much work. A bad or wrong driver will cause strange things to happen in that region.
Fav quote - "Experience is whatcha don't get 'till ya don't need it no more."
System - Athlon 1.4GHz, Win98, Hauppauge PVR250 receiver and compressor.
Software -Magix Movie Edit Pro 10, Nero 6 + NeroVision Express, Moho 4.61, PSP 8.1, Bryce, Quicktime 6.52 pro, Goldwave 5, DVD-Lab.
Cameras - Panasonic GS9, Canon ES8400V, Canon EOS D20 and Canon A70