How do i delete something that access is denied? Safemode won't do it

[fumbduck]

I am trying to delete a windows install off of a drive that no longer boots windows, so it's just taking up useless space, however it has too much on it that i can lose by format, so I just want to drop the unncessary windows files, but it says access is denied.

 

[RVN]

In XP format the drive or partition under admin tools/comp mgt/storage/disk mgt