I have 4 gb ram, but only 2.7 gb ram usable in a 64 bit windows 10 pro

[Bubble_Double]

So i left my PC on over night, so it could download some games, then i came back, and i got lag on almost every game, (like freezing and stuff like that). And then, when i checked my task manager, it only showed that i had 2.7 gb ram usable, before i had like 3.something usable. My pc is a potato btw, i have a ATI Radeon HD 3600, and a intel core 2 duo e8400 (im going to upgrade in a few months) but still, i didn't get freezes in games like Rocket League, GMOD, CSGO etc. This freezing happened only today, is there a solution?

 

[Colif]

Are you certain its 64 bit? That number looks familiar? http://www.tomshardware.com/forum/id-2934589/4gb-ram-bit-w10-7gb-usable.html

 

[Bubble_Double]

Are you certain its 64 bit? That number looks familiar? http://www.tomshardware.com/forum/id-2934589/4gb-ram-bit-w10-7gb-usable.html

im 100% sure that it's 64 bit

 

[Colif]

In taskbar, on the memory tab of performance screen, how much is showing as hardware reserved? can you show a screen shot?

 

[Bubble_Double]

In taskbar, on the memory tab of performance screen, how much is showing as hardware reserved? can you show a screen shot?

Nvm dude, i just used msconfig, and now i have all my cores and ram avaiable, thanks for the help anyways!