It could be a problem with your settings.
If you use Firefox it could be your cache settings. Go to your options, then privacy, then cache. Where it says Use up to: __ MB of disk space for cache, look and see if it is '0' or a small number, if it is try changing it to 50.
If you use IE it could be your temporary internet file settings. Go to internet options, general, where it says temporary internet files click settings, where it says check for newer versions of stored pages check automatically. You can also select how much disk space to use here also, your choice.
Hope this fixes it
If it doesn't, sorry my knowledge is limited