Hello, I have upgraded to win 7 64-bit from xp. With xp I had my WD 15 EARS Green drive set-up with the jumpers set to 7 and 8. With win 7 the drive is performing painfully slowly, and I have read that this may be due to the jumper being on 7&8--a setting that is recommended only for XP. So I removed the jumper and rebooted to find that the boot manager is not found. So obviously this has messed with the partition because when I try a repair from the installation disk, no OS is seen. Will it be possible to repair the boot record so that I can run the system with the jumper removed, or does this require a much dreaded formatting and a reinstall? I currently have 2 partitions on the drive, if I have to reformat and reinstall, will I need to do so for both, or only the partition with the OS? Cheers.