So, here is what happens on my computer. I've installed three HDDs, one 7200rpm which is the primary one, and two 5400rpm HDDs which I use for storing movies and TV Shows. It used to work normally until a week ago. I turned on my PC, it took too long to post(like 45 seconds) and when it finally loaded the OS, one of my 5400 HDD wouldn't appear in windows explorer. So, I removed the HDD that I thought was causing the problem and it posted normally (6 seconds). What do you thing is causing this problem? Please ask if you need any additional information.