New
#11
Yes, it can be done - we do it all the time here.
The Win7 license stickered to the laptop is a batch key so it requires a robocall to MS to sort out the exact key number. You can audit the exact key using Attachment 44442
However, every license for Win7 is able to be either 32 or 64 bit, your choice. Either can be switched during reinstall and are viewed as the same license.
So the question is the installer. In Windows 7 as Vista all of the installers are the same, with versions hidden by the presence of an ei.cfg file in Sources folder.
So if necessary to activate your license, extract the ISO to your desktop, remove that file, recompile the ISO using this Vlite to burn to DVD an all-versions installer: Bootable ISO - Create from Installation Files
Wait until after install to activate with key at Computer>Properties link.