/q /norestart And now? How to solve? ItaloEvil, here is the same log from my install of .NET 4 on HW under W7. It looks pretty much the same and I do not think it is really an error. When I look at almost any of the .log files on my W7 installs, I see errors all over the place. Please note the next to last line "[5/22/2010, 10:41:10] Exiting with result code: 0x0", which is the same as yours. I have no problems that I am aware of and would ask what if any problems you have. I think this is OK. Enjoy, John. And now? How to solve?