If you have XP then you can do backups - however, if you have XP Home, it is not installed by default.
Open your XP CD-ROM (right click the drive in My Computer>click Browse>look for \valueadd\msft\ntbackup
Install the file NTBACKUP.MSI by double clicking on it.
The wizard can be found from Start>Programs>Accessories>System Tools>Backup.
What type of problems do you have with Nero?