- Some programs have the nasty habit of "occupying" over time more and more memory and NOT giving back any of it. Does Task Manager say which process(es) is/are "occupying" all that memory ? Are you able to kill that\those process(es) ?
- Install a program called CLEANMEM. The program is able to reduce memory usage (dramatically). It also can collapse the filecache (Can occupy A LOT OF memory as well).
Mod Edit: Removed links which, IMO, make post spam - Hamluis.
(On my Win 7 Ultimate system with 4 GB, with CLEANMEM running memory usage rarely exceeds 50% any more).
Suggesting an "optimizer" utility as a solution...to an undefined cause of a problem...IMO, seems a curious approach to take, although the intent may be good. I suggest we await the post of some system data...before making recommendations of any type. Excess memory usage is often tied to malware, among other things...it may not necessarily be a benign scenario which the OP has.
As for any "optimizer"...I would say that it's illogical to assume that adding a program...will result in less system resources "being used"...when the simple addition of said program has placed an additional burden on the system.
Memory usage...is no indicator of a problem in itself. Certain applications/processes (such as rendering) are likely to drive many systems into the upper limits of memory usage...dependent on how much RAM is installed and the application. There is no magical percentage where RAM usage is supposed to fall.
The only function that RAM has..is to be used by the system. No dividends for having more than you need, but penalties for not having enough installed.
Edited by hamluis, 18 April 2014 - 05:18 PM.