If this is the wrong board to post this in, my apologies.
So, about two or three months ago my laptop's motherboard died. It was an old asus machine, and was years out of warranty, so I decided to simply recycle it and buy another desktop... I've always liked them better anyways. I bought a Dell Inspiron from Office Depot, seemed like a pretty nice deal on the machine that I got. In any case, it ran smooth, and the built in graphics on its i5 processor allowed me to play quite a few of my games until I could invest in a dedicated GPU. A month ago, I bought a new Thermaltake power supply to facilitate eventually getting said GPU, and a week or two later, grabbed an Nvidia GTX 750ti for a nice price, threw it in, and drooled over how nicely it played my games. Two monitors, Skyrim at max settings on one screen, Netflix streaming House on the other.
For a couple weeks everything was groovy. I was able to play my games typically at least at 60 FPS smooth, I was able to multitask, I was even able to record plenty of my games at 60 FPS with fraps, NO PROBLEM, I was thrilled with how quickly windows 8.1 started up every time... The suddenly, about a week ago, that all changed.
For some reason, my ram usage in task manager is almost always above 75%, even with nothing but skype and the task manager running. (No call going on skype, that is, just the program open.) My hard-drive usage is fine at times, but most of the time I'm doing ANYTHING at all, including opening task manager, or playing one of my games, it'll jump around, between 100%, 90% and low, but almost always hovers at 90%-ish unless I'm not doing anything.
Games now stutter in places, and sometimes hang and lag, and I have no idea why. Looking through my task manager, nothing is using enough ram to come close to taking up more than 50% of my 8 gigs, it just constantly is. Fraps can barely record without slowing my game to half a crawl now, even typing this post stutters every few minutes. I've run checks with windows defender, system came up clean, and I shut the computer down every night. I have no idea why all of the sudden, as if a switch was flipped, the machine now is not running any near as clean and lightning fast as it used to.
I'm at a loss, and I have no idea what the problem could be, or how to remedy it... So I'm crying out for help.
Of course, here are my computer's specs:
Dell Inspiron Desktop
Intel Core i5-4460 CPU @ 3.20GHz (Quad core, I believe?)
Windows 8.1 x64bit
Nvidia GTX 750ti w/ 2gb VRAM
500w Thermaltake PSU
1tb HDD (Not solid state, unsure of the brand/manufacturer)
Some of the highest memory hogs in Task Manager are the Antimalware Service Executable (I guess has to do with Windows Defender?) And Service Host: Local System (Network Restricted) (Unsure what that even is. I'm entirely new to anything newer than Windows XP, old laptop had 7, but was a hand-me-down, I only had that for maybe seven months, previous owner had it maybe five years.)
Edit: Forgot to mention, I'm willing to provide whatever logs, reports, dxdiag, anything to help diagnose the problem.
Edited by cbcore, 19 June 2015 - 10:36 PM.