Why do I always very slow to open pages?

Users questions: I am always very slow to open pages. Ever before, a lot of pages very quickly, and now is very slow to open four or five pages. I think I can rule out the possibility that the virus first reason, because I got Rising 2008, killing did not toxic. My C drive a total of 7.79G, 2.32G free space is there is not Is this why? Are there any other reasons? How do I do?
Experts answer: could not clean up system junk too long now? There are also cleaning the registry. It can also be IE temporary folders transferred from the system tray, so the system will be significantly faster speed. Open the Web page will be faster.
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