Format in the default - NTFS, if that is the way you want to go. But please, before you do that, go back to post number 5 and follow Troubles request. You may be formatting a boot drive, with other data on it, or something essentia to the running of your OS.
You may find it simpler to post a snip like this:
Following Trouble's first line (to "so it fills the whole screen") hit the ALT and Print Screen keys, at the same time.
Open the built in "paint" program from the menu. Click the Ctrl and V keys. This will reproduce your captured image. Save as, somewhere, and post it in this thread.