Quote from Scataphagos:
(1) RAM experiences "memory leakage", I think is the term.
Concurred. Memory leakage. Improper "heap management" is the formal school term. More commonly known as "oops, I forgot...". Especially computer software written by not-quite-professionals. Over time, allocated memories are not properly released which cause resource contention.
I run Win 7 with 6GB RAM (desktop) and 8GB RAM (laptop)... I still face memory depletion issue. I think one of the major reasons is these days websites/webpages got a lot of advertisements (video) and animation stuff. Java, Adobe Flash, whatever technologies they use... these "stuffers" (I called them) are the culprits most of the time IMO in hogging up system resources. Not your trading platform. Unless you absolutely don't use your trading box for the Internet...
At any rate, I just routinely reboot my computers pretty much daily.