A lot of laptop manufacturers create a "recovery" partition in the Windows install. If you do not wipe all the drive's partitions, the files are kept and loaded back onto any "fresh" install of Windows. So the bloatware can come back even if you do a "factory" install. This is also a catch-22 scenario as if there are special drivers needed, they would also be inside that partition. Sooo, clone the hard drive before wiping it. Visit the manufacturer's site for drivers and store them on the cloned drive or make sure that there is a driver CD available. Go into the install from a USB drive and erase all of the partitions and let Windows create a new set. THEN you are ready to install Windows again.