How To Boot With Lowest Resources (not An Msconfig Question)

So I need to run some video programs for recording that require most of my desktop resources free. Otherwise, I get a lot of lag in some places. I have several different programs that load at start up that are kind of a hog (like Plex, my BitDefender anti-virus, etc).

Is there a way to setup some alternative user account or log in where I can load just a few of the basic necessary system tasks I want for Windows and that's it? That way, when I need to run my video apps, I can just restart into that log-in or setup without having to manually close everything each time? I know that sounds a lot like MSCONFIG, but I need more than just the basic functionality of safe mode.

If not, is there a program that will do this on the fly easier than the manual task manager/end task method?

 

It would help if you stated your OS version and hardware specs, as well as the recording software, so we might have a clue about where the bottlenecks might be - graphics capabilities and disk throughput would be high on that list.

XP had a method of doing this built in, it worked quite well.

I had a quick look around and only this one jumped out at me. I haven't tried it for years, I mostly use manual methods.

 

UPDATE:

So I used a combo of Wise Game Boost and Razor to eliminate any background process and services to where I was running a complete barebones start up when loading the stream (this is what I was having trouble with, sorry I forgot to mention it earlier). Unfortunately, nothing helped. I did however discover the problem. I had resource monitor open on another monitor during the chugging period, and the CPU is maxing out at 100% in those instances. So that tells me I'm short on hardware power.

So what should I do. Should I...

A) Buy a new CPU ( currently run a i7 4770 3.5GHz, 16Gb ram and a 1060 Nvidia card). If so, which one is affordable that can do the job better than this one?
B) Buy an Elgato card and just run my gaming laptop into that separately, so only my streaming is handled on my desk and the workload for the newer games is on my laptop

Thoughts?