This can happen if there is a USB device plugged into the machine. Check and take anything out before switching on. Also make sure the DVD drive is empty.
Finally, the new Hard drive - is it really brand new? you will need to install an operating system on it if it is - and if it isnt, then the hardware that the drive now sees may not be compatible with the operating system already on it. There may be too many hardware changes and it not be configured for it. If this is the case try doing a repair install of the operating system, or if you dont mind losing all the data and programs on it do a full (clean) install of the operating system.
I will try to take the disc out of the disc drive and see if that helps.
But no, the Hard Drive is not exactly new. It's from another, broken laptop, but it was bigger so we just swapped the bigger Hard Drive to the working laptop. So that's probably the problem, cause it's not wiped clean.
I can't get to a point where it will let me repair/clean-install anything, cause like I said, I always get the black-screen-and-cursor.
Could I put the Hard Drive back in the other laptop, format it, then put it back in the other laptop?
We put the Hard Drive back in the original laptop and powered it on.
It requires a password. Not for the windows, but the computer itself I guess. It's like the BIOS theme. It's a blue and grey box which pops up as soon as the computer comes on. There are no other screens, and you don't even get the option to use the ESC or Function keys. It goes directly to a BIOS-esque password screen. We do not know this password.
Any way to bypass this? Perhaps a factory reset or something?
Have you done a clean Windows installation on the new drive. If it comes from another PC, a new installation should be done. To install OS on that drive, you need to use installation USB or DVD and boot from it ( change boot order from BIOS). If you have done that and you still get the black screen and cursor, try opening Task Manger, by pressing CTRL+ALT+DEL. Enter processes and end the explorer.exe. From file add new process, writing explorer.exe in the line. Any change?
In general, you could format the drive on its original PC, but you still need to install OS from your PC. Resetting BIOS can be done from the BIOS menu or removing the CMOS battery for a few seconds and the rebooting. I recommend you to check your motherboard's manual before going for the CMOS.