I'm obviously a noob to this forum. I have a Lite-on 52x24x52 cdrw. I use the bundled Nero software, o/s is W2Kp. My burner has worked problem free for the past 3 mos. I noticed after installing more RAM (now total 1536) & a new AMD 2400+ cpu, that I was unable to burn, it would hang up at 8% & give me write error messages. I uninstalled & reinstalled Nero, I was able to burn again, but a little more slowly. The oddest thing is my buffer bars go crazy the top bar (I believe read) varies from 4%-100%, & the bottom bar (I believe write buffer) varies from 20%-87%. I noticed that my cpu usage spikes to 100% & holds there til the read buffer goes down to 4%, then cpu usage will drop to 4% or so then the read buffer goes back up to 100% again. I am using the same CD's I've always used (burned about 75 out of 100 successfully). I've tested RAM & CPU, both pass 100% without any errors. Could it be a burner failure? Is there any way of testing this? It plays any game or audio cd without any difficulty. I appreciate any help.