Samsung Recovery Solution – create a custom recovery partition

Windows 8 has this awesome new feature called reset mode, basically it allows you to start from scratch without doing a traditional format. It wipes all the stuff from your PC and leaves you with a clean installation, just as if you had indeed done a format.

This solution is likely to work for you, however from your question the key point is that you dont want to use a disc or USB, unfortunately using reset mode does require some form of installation media. Luckily for you i have written about a work around a while back on the How-To Geek website that allows you to use it with no installation media.

If you need to know how to use reset mode or want to know more about it, you can read this article.

There is plenty of space on the disk. You are getting this error for a different reason. If your machine is anything but a desktop then you would get the error you have.

https://technet.microsoft.com/library/354e5163-f388-4354-984c-ea4e4206694c

You aren't able to delete the recovery partition because it EFI protected. You should be able to force by using the override command.

https://technet.microsoft.com/en-us/library/cc766465(v=ws.10).aspx

I would try using diskpart (from an elevated command prompt) to delete the partition and convert to dynamic disk.

DISKPART> list disk
DISKPART> select disk 4

Disk 4 is now the selected disk.

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Primary            223 GB  1024 KB
  Partition 3    Recovery           450 MB   223 GB

DISKPART> select partition 3

Partition 3 is now the selected partition.

DISKPART> delete partition override

DiskPart successfully deleted the selected partition.

DISKPART> list partition

  Partition ###  Type              Size     Offset
  -------------  ----------------  -------  -------
  Partition 1    Primary            223 GB  1024 KB

Usually I re-purpose drives so I don't worry about data loss but back up your data and use a desktop.