Machine has win7 Ultimate. I recently changed the hard drive. When I went boot, the screen displayed "Enter Password ". This machine has never had a password and I am at a loss as to what is wrong. This machine has previously been running well for over six months. Any HD that I substitute (I've tried four) has the same result.
Also did you try clearing the BIOS password using the jumpers on the MB that are meant to clear the boot/BIOS password?
My Computer
At a glance
Windows 7 Pro x64 SP1 and Mac OS X 10.8.3Intel Core i7-3820 Sandy Bridge-E at 4.75 GHz8 x Corsair 8GB DDR3 64 GB Kit @1866 Overcloc...GTX 580 and MSI R6870
1 x Corsair Force Series GT CSSD-F60GBGT-BK (OS)
2 x Western Digital Caviar Black Sata III 750GB (Raid 0)
1 x Western Digital Caviar Black Sata III 1TB (Media)
2 x Western Digital Caviar Black Sata II 640GB (Raid 0)
4 x GELID Solutions FN-TX12-15 120mm Case Fan with Superior Temperature Control
1 x Corsair 140mm Case Fan
1 x SilverStone FP55B Aluminum front panel 5.25" to a 3.5" bay converter
1 x Ultra Card Reader
1 x Sony Blu-ray Burner BD-5300S-0B
In addition to the above, if this is to log on to your user account in the log on screen at startup, then you could use the tutorial to set Windows 7 to log on to the user acccount automatically after you have already logged in.
If it is the BIOS password it will not say no os due to the BIOS password is requiered to move on to boot.
My Computer
At a glance
Windows 7 Pro x64 SP1 and Mac OS X 10.8.3Intel Core i7-3820 Sandy Bridge-E at 4.75 GHz8 x Corsair 8GB DDR3 64 GB Kit @1866 Overcloc...GTX 580 and MSI R6870
1 x Corsair Force Series GT CSSD-F60GBGT-BK (OS)
2 x Western Digital Caviar Black Sata III 750GB (Raid 0)
1 x Western Digital Caviar Black Sata III 1TB (Media)
2 x Western Digital Caviar Black Sata II 640GB (Raid 0)
4 x GELID Solutions FN-TX12-15 120mm Case Fan with Superior Temperature Control
1 x Corsair 140mm Case Fan
1 x SilverStone FP55B Aluminum front panel 5.25" to a 3.5" bay converter
1 x Ultra Card Reader
1 x Sony Blu-ray Burner BD-5300S-0B