How to remove windows 7 safely from my dual boot win7/win8 pc ?

i have a pc which is dual boot with windows 7 ultimate 64 bit & windows 8 pro 64 bit, my pc had four drives C: D: E: F:, windows 7 is on "D:" drive & windows 8 is on C: drive(i had set win8 as current & default OS), now when i opened
disk management i found that the D: drive where win7 is residing is marked as
system,active,primary partition, now i don't want win7 anymore , i want only win8 on my pc, i want to format & get back clean empty D drive to use for other stuff (i don't want to delete the D drive partition), can any one explain me the steps
needed to achieve this safely.

Since you've selected as default OS as Windows 8.1 you can go to disk management console and format the drive as required.
You can remove the Win 7 entry from boot loader:
To launch msconfig:
Click Start
In the Search text box, type msconfig
Launch msconfig by selecting it from the search results above the search text box.
After msconfig is launched:
Go to the Boot tab
Slect the boot entry you want to delete.
Click the Delete button and then click OK.
Arnav Sharma | http://arnavsharma.net/ Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading
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naequs wrote:
bumping this because i have the EXACT same problem !
however i installed grub to sda1 because i didnt want my installs to mess with each other (not that ive had any problems with grub in mbr though...) .
this just looked cleaner to me.
if anyone has figured out how to prevent windows from automagically changing the bootgflag, id like to know !
but maybe this is a question more suitable for a windoze forum
tia
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