My net framework 3.5 is broken. Verification tool (http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx) says it's OK, but its not. Net framework 3.5 can't be just uninstalled/installed on Windows 7. But you can do this by add/remove windows features. For me this doesn't work, I receive thus (not very helpful) error message ... "An error occurred. not all of the updates were successfully uninstalled" I found DISM tool which does exactly same, but have log. And now: DISM /online /disable-feature /FeatureName:NetFx3 1603 error. And log: http://pastebin.com/4jBkEiT6 Any ideas how to do it?