Seems odd to ask these questions but i'm not really an expert by any stretch of the imagination; 1) do you ever clean out your temporary internet files folder manually and 2) is your computer a reasonable performance one. I only ask this because i had a rather slow computer before and it used to stick a bit around certain areas where there could be many files. See if manually clearing the temp internet files does anything (to do this go to control panel > Internet Options >delete temporary internet files.) and if you already did this and have a reasonably fast computer then sorry

I'm lost. But i tried to help!