I use a dell latitude e5420 with Windows 7 Pro x64 and i5-2520M CPU @ 2.50GHz with 4gb of ddr3 RAM.
I regularly clean with ccleaner,defragment my drive and perform a disk file clean up now and then but other than adjusting my start up programs I don't know what else to do.
As for start-up programs I am unsure of what processes I need to run and which I don't therefore I'm sure I have a couple that maybe I could do without.
I was considering upgrading my ram to 8gb ddr3 but read somewhere that 8gb is over the top and un needed for win 7 unless you play video games on your computer.
Any suggestions would be great.