After I set up a mates laptop with Windows 7 I noticed Nero, Hp Printer setup and a few other progs I can't remember wouldn't install. When I was trying to install Nero it would just stall at about 7% or 11% during install. After doing some research into the why along with the rest I came upon a solution to install the HP Printer in Windows 7. I then tried it on some of the other progs and it worked a treat.
Go to you Nero setup .exe, right click it and select properties. Click on the Compatablity tab at the top. Tick the 'Run this Program in Compatability mode' and select Vista in the drop down menu, tick the run as administrator box and apply and ok. Now double click the setup file and it should install okay. Hope this helps mate.