We had a system crash and our computer shop replaced our 700gb with a 500gb hard drive. Ever since our computer has been slow and the Internet pages are not operating correctly. When we open a page you need to minimize it to get it to refresh and it takes forever to load things. Any ideas on why, they told us the hard drive size would make no difference on our HP desktop performance. It is using Windows 7 operating system. Thanks for any advice or help.