Canned Grounding Rant-
shut down system and remove side panel. with the power cable plugged into the PSU touch a bare unpainted metal area of the case. (my favorite spot is an unpainted screw securing the PSU) once you have grounded yourself you can unplug the computers power cable from the PSU and can touch the system.
if you move your feet, or shuffle in your chair, plug in the cord, reground yourself and unplug again.
end canned rant-
with the new and old drive hooked up you can boot the system
enter the bios (see motherboard manual for trigger key - usually Del, F2, F10, or F12)
verify the boot settings and that the original drive is set to be the first bootable device
save and exit the BIOS
allow system to boot
once running you may need to import the foreign disk to your windows (if windows sees the drive skip down to *). from a run dialog/command prompt type diskmgmt.msc to open disk manager. Windows 8,10: press Win+X and click disk manager
open disk manager and import the disk.
*you can now manipulate the files on the newly imported disk, format the drive or leave it as is.