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#11
You can try cleaning out the temporary files, cookies, etc with CCleaner. I can't endorse the registry cleaner part, but you can use the other stuff safely.
Check the performance tab in Task Manager. Could you please post a screenshot?
A Preferred Method of Uploading/Posting Screen Shots
You could improve your speed further by replacing Kaspersky with Microsoft Security Essentials.
Uninstall all unneeded programs in Programs and Features.