I never use kmail and never plan to use it. Can I safely remove it? I tried to remove it with sudo apt-get remove; and computer became unusable... What are alternatives to uninstalling to stop those programs? Like renaming or removing associated files, or chmodding them? How can I know which program uses, edits, reads which files? When I click d to delete a file, I see a search function. Maybe it is dash program, which is called spyware by people on internet. I would certainly block this program if I knew how this could be done. ...... Another related thing is firefox. In about:config there are references to external sites like facebook, yahoo, google, , What is the point of this. Also there is reference to ubuntu. While editing those stuff not only firefox , but whole computer became unusable. I don't want any connection between unrelated programs, share data, send anything outside, either as crash report or anything else. ..These are not about me, these are general questions....Akonadi, nepomuk running many processes all the time. maybe they are just things that make computer work hard, get hot and noisy; and this also eat battery life. kwallet running al the time.