I haven't actually turned on this computer in a few months (mainly been using my laptop lately) and it turned on fine when I fired it up today. However, after I uninstalled some stuff and restarted, ...

The RAM your Mac uses to support its OS and applications purges its contents every time you shut down your computer as well as when you unplug a desktop system or remove the main battery from a laptop ...

Errant external devices have long been known to be causes of kernel panics, inability to startup, and most commonly system-wide freezes, as outlined in our "Startup Fails" and "System-wide Freezes" ...