You should clear your temporary internet files folder regularly anyway.
To do it manually, in IE, click Tools, Internet Options, or on the Desktop, right click IE icon and select Properties. It opens the General tab. In the middle section on Temporary Internet Files, click Delete files.
You can also change the setting for how large the internet "cache" should be, by clicking "Settings" in the same section. By default it's a certain percentage of your hard disk space, which is way too large. You don't need more than 10MB, but you can set it larger or smaller than that as you like.
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