How to solve db2 setup failure on Windows 2012

Last week i was installing the db2 10 server on top of windows 2012.  The setup program was unable to install the .Net 3.5 framework.
I try install the .Net 3.5 from Add Features menu but it´s did not work well.

So my Windows Administrator do the following using the Windows 2012 dvd

Dism /online /cleanup-image /scanhealth
Dism.exe /online /enable-feature /featurename:NetFX3 /All  /LimitAccess /Source:E:sourcessxs "E:" The "E:" is the dvd unity letter