Had a new PC for a couple of months now but only got round to using the DVD writer a couple of days ago.
Grabbed a box of 10 Imation 4.7 GB 120 minute DVD-R's from PC World at the weekend and just undid the wrapper from two discs, stuffed them in the drive to try and write to them and got the message back 'Can't write to disc because it's not blank' or words to that effect.
OK, RTFM time and it turns out that my DVD writer uses DVD+R's. Doh!!! Didn't know there was a difference. I've opened the box now and a couple of the disc wrappers so I can't take 'em back.
So now I have a fresh box of 10 unwritten DVD-R's (albeit a couple of wrappers undone) that are useless to me. So, if anybody uses these things and needs some more can you do me a favour and buy some equivalent DVD+R's instead. I'll swap 'em with mine and pay the postage.