Ok, well, your drive doesn't like Memorex, that's for sure. Have these Memorex discs worked for you in the past?
Also can you tell me the model of your DVD drive. You can find it in device manager.
Please post back and let me know if you need more help.
The Memorex discs have worked in the past, though I can only put my hands on one onto which I have backed up some files. I have been able both to burn to and read from these discs in the past.
The DVD drive is listed in the Device Manager properties as HL-DT-ST DVD+-RW GSA-H73N ATA / CD-ROM Drive. I believe I saw in the start-up diagnostics the Hitachi/LG brand name. I found a couple other pleas for help for this same spec, but the only one with a resolution involved a firmware update that is not helping me.