If the above doesn't help, try this (in Internet Explorer),
Tools->Internet Options->Settings->View Files->Edit->Select All->File->Delete->Yes
This empties the cache of all files and cookies that you don't really need. The ones that are helpful, such as allowing frequently visited pages to load a bit quicker, will soon be gathered again the first time you visit your regular pages.
Some cookies are not removed this way; you can't easily see them or remove them. They are often referred to as Spyware, and that's where Ad-aware or Spy-Bot come in...but that's for another day
peace
bug