Summary: I was working on replacing my Dell Inspiron 1545 hard drive. So I get a Seagate Momentus ST250LT007 because it is more performance. Bad idea. Evidently the Dell is not compatible with that hard drive. So I back down to just replacing it with the original equipment witch is this. Although I had to partition the drive to get Windows Installer to see it and then delete the partition when installing Windows, all is good in the Dell Inspiron 1545 laptop once again.