francesco palumbo said:
Plug it, no problem.
It has windows on it, will it mess with the booting up?
No. The computer should keep booting as it had before.
that being said, it can;t hurt to go into the BIOS and check HDD boot priorities the first time you boot after connecting the drive to make sure that your current HDD had priority. but, eve if you don;t, it's not a problem if the computer boots once from the old drive. Won;t affect your current install.