I was having trouble uninstalling an old ver of nero off a customers system today, they were having a new dvdrw installed and there ver of Nero that came with the drive i was removing didnt support the new DVDRW that was being installed, in this case the nero would not remove from add/remove program just kept giving a file error please reinsert the orig nero cd (of course the cust has lost that), then when i went to install the new ner of nero (in this case 6) it would try and remove the old ver then give a file error.

I did a google search and found this handy lil util from the Nero website, i ran the program and once it had completed the sweep and clean the system rebooted then the new nero installed with no problems.

http://www.nero.com/nero6/eng/General_Clean_Tool.html