I am not sure how much erasing is done when using Partition Magic 8.0 Windows
version "Delete and Secure Erase" option, but it certainly doesn't erase
Windows Boot sector code from the hard drive

One way you can get rid of the Windows Boot sector code is to use Partition
Magic DOS - reformat the partition in Linix - then reformat the same
partition back to NTFS - reboot back into the same partition by making said
partition the Active partition - you see the following error message missing

"NTLDR is missing
Press CTRL + ALT + DEL to restart

If at any time you see the above error message displayed, you have booted
into a partition that has Windows Boot Sector code written at the very
beginning of the booted partition

If the bootstrap files (NTLDR, NTDETECT.COM, & boot.ini) are present in the
root of the partition - you will not see the above error message -

If the boot path is correct as selected / specified by the boot.ini file,
Windows will boot up

If the boot path is wrong the next error message you will see is the following

"Windows could not start because the following file is missing or corrupt:
<Windows root>\system32\hal.dll"

By the way, although it is commonly said that Windows boot.ini file is an
essential file in the bootup process, Windows will boot up without the file
being present as long as the active partition has an installed Windows folder
in the root of the active partition - you will see an error message saying
that the boot.ini file is missing or corrupt - it will then attempt to boot
up with a default path of C:\Windows and if a Windows install folder is
present, Windows will boot up