Hi Enrique,
last week I faced the same issue. In order to solve this (experimentally) I did two changes on my system:
first I installed Eclipse Kepler because I heard that it's more performant than Juno; the second thing was to inactivate the window service "Windows Font Cache Service" (it's running in background by default, seems that there were some changes by last updates) - since then my system is running as fast as I am used to know it.
Maybe it helps.
Regards
Martin