Hey guys. I've recently been noticing a lot of memory being used by my system. Last night I restarted it and turned the monitor off. Cpu usage was right around 5% and memory was only 2.5 gb out of 8gb. This morning I woke up and cpu usage was at 20% and ram usage at 70%. I had nothing running last night and ntoskrnl was using 25% of my memory. I have run malware scans and they come back clean. All my drivers are up to date. What else could I do to fix this?

I also have poolmon installed. I tried using that to find what was wrong but I can't make heads or tails of it.