Summary: I bought this hard drive to put in a 4 year old computer because I toasted the old hard drive. I installed the drive in place of the old one with no problems, I popped in a Windows 7 DVD and was off to the races. As soon as Windows 7 was done installing I ran the Windows Experience Rating program and the drive got a 5.9.
Summary: I've tried many HDD brands and I'm partial to WD drives. I've never had any problems with any of them. I still have an old 80 GB EIDE drive until I ran out of room for it and it's several years old. No bad sectors and never a problem. Only retired due to size. This drive is performing as expected. Easy install, no problems. Using it as my primary, multi-boot OS drive. Pretty quiet and would recommend Caviars to anyone.