hello,I can not burn cds,I use Nero and deepburner.deepburner shows it writes the cd,and ejects it as finished, but the disc is blank.I can burn dvd's but no multi sessions,on both win xp and win7. I have checked a bunch of forums but no help never the same problem. 2 dvd burners and know they are okay.I cleared cmos and formated,then reloaded win xp and win 7.same problem,I have wiped out a lot on blank disks. it seems strange they I can write dvd's but no multi sessions. could it be maybe a virus ? thanks Stan