Hi Matt Thanks for your input. Yes, it did occur to me that an aircraft or a guage I had installed might be causing the problem

But I have no way of finding out!!!! Do I have to save any other files apart from the ones I have mentioned? I have discs for all my payware a/c so reloading them won't be a problem, it's all the freeware stuff that I am not sure about
Regards.................Alan