Starting last night, Google Chrome was taking longer than usual to open webpages. Now under an hour ago, other applications and files take up to 10 seconds to open. My laptop is running fine now because I restarted. I ran CCleaner to clean out my history, cookies, etc. I also ran scans with Microsoft Security Essentials and Malwarebytes, both found nothing. I did not install any software or make any hardware changes. Any ideas?