I have XP build 2600, and I have tired NERO 5.5, CDRWIN 4a-e?, Rixio 5, CLONECD.. and I have found that only NERO works , and that is 9 times out of ten without a problem. after I installed CDRWIN or CLONECD my system became unstable, and when those apps wrote a CD, there ended up being nothing on it. dont know why, but I ended up reinstalling XP, and only installing NERO.