so i recently acquired a 500gb wd black 2.5 " laptop hdd. i want to replace my 160gb drive with this new on. the problem i have is when i isntall it, and try to install win 7 onto it, it says drives not found. but when i put it in my desktop, it was visible and said it was healthy. also, it is visible in my laptop bios as well. not sure what is going on. i was told it was formatted, is that the problem? not sure how to un-format if so either. thanks in advance!!!!!