I suggest just formatting the hard disk drive. Unless there is information on it that you need it should be ok to format it.
- > type in "Disk Management" ->
In here you will need to find your HDD that corresponds to the WD Raptor. You should see both partitions on ONE disk (or row).
In the same row you should see the 139GB and 100MB, just delete both volumes.
You should now have 2 unaalocated volumes. In order for Windows to use them you need to format them. When you do so it will just be 1 single partition disk.
PLEASE TAKE EXTREME CAUTION Partition or Volume - Delete
This is a tutorial that guides you trough the process of deleting volumesm, in case my instructions were a mess.
Please ask questions if you have any doubts
THIS SHOULD RESULT IN A BASIC DISK TYPE. Is that what you want?