update by downloading the files directly and then applying them:
pre cc updates: http://www.adobe.com/downloads/updates/
cc 2104 updates: http://prodesigntools.com/adobe-cc-2014-updates-links-windows.html
Thanks kglad but there is not link to the last update (2015). They are all old updates...
then you can't update directly.
you'll need to fix that error. first thing is (if you don't know) find out what it is and what's causing it: Troubleshoot install issues with log files | CS5, CS5.5, CS6