I replaced my WD 250GB RPM 5400 with a WD 500GB RPM 7200 and I get a "No boot sector on internal hard drive" "No bootable devices" I have both original disks ( Operating System Windows 7 and Applications.) I've checked the BIOS and it shows the new HDD. I put the Operating System CD in and started the computer than I hit F12 went to CD/DVD and hit enter I received the message "No boot sector on Internal hard drive" "No bootable devices" What am I doing wrong?
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