I am running Windows 10. Starting few weeks ago SWP5.5 will not typeset documents (blank pages appear in TrueTeX DVI Previewer). I re-installed SWP5.5 and the problem is fixed ... until I turned the computer off. Turning the computer back on and the failure to typeset returns. (It's been a nuisance, needless to say, re-installing SWP5.5 every time I turn my computer on!) This problem does not occur on my two other computers running Windows 7. Anyone else having this problem?