How to start your computer when it won’t. Boot to command prompt, edit system.ini file, change the boot line shell=explorer to shell=progman.exe save & restart. Windows will start with the 3.1 program manager. Click file, run, type control appwiz.cpl and hit enter. This will bring up the add/remove programs wizard. Select your program to remove. Remember and change the system.ini file back to shell=explorer.exe
I found this tip on a website it should work with your windows xp pro box. But be careful when you try this. This should allow you to remove the Nero software. Then maybe you can try reinstalling it. Hope that helps.