Removing Dual boot in My case

[gevin20]

i installed windows8 on C drive and and windows 7 on D drive..can i delete D directly by logging in windows 8 and then removing boot entry from easyBCD?

 

[theog]

As D: is Logical, yes
Dual Boot Windows 7 and Windows 8 - Delete Windows 7

 

[gregrocker]

Removing the Win7 entry in EasyBCD does not remove the OS. You'll need to delete or format D in Disk Mgmt in order to correctly remove Win7.

If Disk Mgmt will not cooperate use Partition Wizard to delete D, create a new partition there, or extend one of the other partitions into its space even if they're not adjacent as shown in How to extend partition easily with Partition Wizard - video help.