Hi there everyone! I've been meaning to join for a while, I've lurked these boards quite often to learn new things. After a recent issue with how slow my computer was + a Trojan (I don't even know. Really. Never letting anyone touch my computer again.), I decided to go through a couple of steps: Upgrade to 8GB RAM. Upgrade to a 500GB Samsung SSD. Do a COMPLETE WIPE of the SSD with a fresh install of Yosemite from a bootable USB. Re-install everything I need for work. I went to restart my computer this morning and... I'm still having issues with lag upon startup, and beach balling every once in a while if I ask it to do too much at once. This is a bit of an issue. I figured the upgrades would help solve this, but it's done nothing to improve the situation I had before I found the Trojan on here. So now I'm assuming it's one of these things: Something else has started to go in the computer. The programs I use for work are slowly murdering the poor thing. ??? Profit! Some facts on the Pro: I am original owner, purchased in mid 2009 time (I don't know how it's a mid-2010 model, but I do remember getting it after my first year of college). With clean install and nothing running, RAM hovers at 2GB use. Clean install plus all the applications I use (minus Adobe Suite at the moment) uses only 21GB of the drive. Programs and such used: Adobe Suite, Sketch, Sublime Text 2, VirtualBox, Chef, Vagrant, Slack, VLC, Transmission, PTA, Chrome, Drive, Steam, Minecraft, XCode, Jing, Sequel Pro. Ruby has been updated, Grunt, and some other coding goodies will be used as well. I've tried some of the other methods listed, but almost nothing opens upon startup and with a clean install, I feel I shouldn't be having these issues. Sorry for the ramble! I appreciate any help and advice!