Have sorted my downloading problem, now another one has appeared!!

After downloading files I attempt to extract them, I get a meassage saying no files to exctract. If I attempt to explore the zip file, it telles me the file is "invaid or corrupted". I know this is not the case as I have tried it with files I have previously succesfully unzipped and installed.
Has only just started happening after some times spent succesfully installing files.
Any suggestions?
Cheers

It would seem for whatever reason you are getting a file a few bytes short of a full meal.


As always with any problems - please state as much info as you can - Browser - ISP - firewall - all these &  more can effect the way your PC interacts with web servers.
There is more info here

http://www.simviation.com/fssimviation.htm