Windows 10: Unable to Erase RW DVD!

Hi, I've a windows installation DVD that is RW and I want to erase it and re-burn, but the 'Erase this Disc' option is greyed out and doesn't work! I tried to format this disk but it shows "The disk is write-protected". The same is the situation for every disk that I insert in my PC. Though, all those are re-writable. What should I do?

:)

 

dvd-rw's

Web search: how to erase DVD-RW in windows.

 

ereasing a dvd-rw

how do I erase a dvd-rw in windows 10

 

SATA DVD-RW Drives

Hey Guys,

So, I finally just bought my new rig: EVGA A1 Mobo (w/ 6 SATA Slots), 2 WD Raptors (SATA - Gonna RAID 0 Boot), 4 Seagate 320GB Barracuda's (SATA - Gonna RAID 5 Storage).
However, I realized I also bought 2 DVD-RW drives, in SATA *Eek! not enough SATA ports on the mobo...

So a couple of questions follow:
1) Is SATA really faster for DVD-RW drives than IDE?
2) Is there anyway to Inline/Series the (2) SATA DVD-RW drives, kinda like you do with IDE (Master/Slave)?
3) Are there any SATA-->IDE reverse adaptors (not the opposite, I know those exist)?
4) Based on the above answers, should I:

• a) Get a PCI-E SATA RAID Card to Handle One of the RAID Arrays, and keep the DVD-RW drives as SATA? (although those are dang expensive, AND I don't know where that PCI Card is gonna fit - got an 8800gtx, PCI Slot-Cooler, Wifi card... an extra slot but no room down there)
• b) Return the DVD-RW SATA drives and get (2) IDE DVD-RW drives?
• Another option that won't require me spending a lot of money?

Eesh, I'm kinda stuck on my build if I don't have a CD Drive to read from for Windows Install(I don't have any extra ones sittin around - and I want to install my RAID 5 Storage array right away)

Suggestions?*Confused