Hello NGC 3242, welcome to Seven Forums!
No, no kind of format will remove/over-write Grub, a complete wipe of the HDD must be done, I would suggest, after you have copied out
or made back-ups
of the data you need to save to external media, use Step One of this tutorial at the link below to do a wipe (secure erase
) to the entire Hard Disk Drive, running this then using the outline in Step Two #2 to create/format and mark Active
a single 100GB partition using diskpart will get you the best possible space to clean install
Windows 7 to. SSD / HDD : Optimize for Windows Reinstallation DISKPART : At PC Startup
Be sure to post back with any further questions you may have and to keep us informed.
Contrary to popular belief, doing a format with Windows 7 does not remove any data at all, it just checks for sector errors and marks the space to be over-written as needed, all the data is still there including all the code from previous/failed installation attempts.