Issue with hard drive partitioning

I can provide any further information if it is required but here is what I know.

Awhile ago, I partitioned my hard drive so I could install Linux (Ubuntu) on the partition and have two operating systems but I wasn't familiar enough with how to use Linux to make any use of it so I reinstalled windows to try and reformat the computer to it's previous state. It worked but the drive was still partitioned. For some time I used the extra partition just as another drive but now I want a single drive on my computer. I keep running into this error, "There is not enough space on the disk(s) to complete this operation." I first ran into this error when I tried deleting the partition but after no success there I tried to reformat the partition so I could use it again but now when I try that it won't work plus it no longer allows me the option to use the drive letter previously selected. An example is when I reformat the drive as letter D the next time I try to reformat that letter is no longer available. Here are some screen shots of my predicament.

My disk management window --> imgur: the simple image sharer
when I try to finish the formatting --> imgur: the simple image sharer
Right clicking the partition to try and delete --> imgur: the simple image sharer
Confirmation message box for deleting partition --> imgur: the simple image sharer
Error when I confirm deletion of partition, see previous error.

This has made 102gb on my hard drive non operational so I would like any help anyone can offer.

I'd download the bootable version of Partition Wizard and burn it to a disc. It's the most flexible partitioning tool around.

http://www.partitionwizard.com/download.html

ignatzatsonic said:

I'd download the bootable version of Partition Wizard and burn it to a disc. It's the most flexible partitioning tool around.

Free download Magic Partition Manager Software, partition magic alternative, free partition magic, partition magic Windows 7 and server partition software - Partition Wizard Online

Unfortunately my computer is a netbook and doesn't have a cd drive. I tried powerISO so create a virtual drive but I can't boot from that while the computer is running. Also, when I tried to boot from a flash drive it said the file failed. I prefer a windows 7 oriented solution to this problem without third party software if that is possible.

whs said:

There is no other Windows option other than Disk Management. If that does not work, PW is your next best option.

I downloaded the executable version and ran it. After a computer restart to close the programs using the hard drive partitions it worked flawlessly! Thank you very much for your solution to this problem!