|No, the OS that came with each unit, is tied to that unit and not transferable. OEM licences can not be moved from one computer to another. |
The hardware is also different and requires the correct drivers for each.
To install XP Pro on the A135, you would have to purchase XP Pro, find all the required XP drivers for it on the Toshiba website, backup all your data files, format the drive, clean install XP, then reinstall all your programs.