I run this same program in my desktop with the same disc brands and do not have this problem. I just updated my nero 6 and this does not help.
Maybe it's your burner itself? Go to your burner manufacturer's website or ACER's driver site and get the latest firmware for your burner. Then try burning a bunch of discs again. Test this with the SAME scenario on your desktop and make sure you're comparing apples-to-apples (ie: both computers have same software, updates, same CD-R, etc. etc.). That should help you narrow down your problem.
If you don't get anywhere there, then it could be a software or hardware conflict. What programs are installed on the laptop vs the desktop? Check your firewall and antivirus rules to make sure Nero 6 has permission to access all functions. As a last resort, compare your hardware, Processor speed, etc.
I may be rambling. but sometimes this is the only way to narrow down a problem.
Oh, and try the microsoft knowledge base, they might have something there as well. Good luck.