BSOD while playing Minecraft, and watching YouTube videos (Win 7 Ultimate x64)

I've been getting bluescreens for the past 3 weeks and nothing I've done will fix it, I've updated my drivers, and run startup restore from the Win7 disk to no avail. The Bluescreens are most common when I'm playing Minecraft, Team Fortress 2, watching YouTube videos in Chrome, or using Skype..... I've attached the 3 MiniDumps I could find in a .zip file and I hope someone can help me

Test your memory using Memtest86

I ran Memtest for about 11 hours and got this

Any errors are not good. If you have more than one memory stick installed, only one is bad, and you need to test them individually

I have 2 sticks, so I'll test them separately

Okay, sorry I took so long to respond but my internet got shut off... I tested both sticks of ram separately and one came up with hundreds of errors and the other was fine. I threw the bad one out and haven't had a bluescreen since. I have however noticed a significant decline in performance and MANY more freezes, I think this can be fixed by just getting another ram card but I would like to know if there's any other way to fix it

No, Windows 7 needs at least 2GB of memory to function well. I have 16GB installed