5 Programs Killing Your Trading PC

Check this out. I went back through hundreds of tech support calls we took this year and I sorted them by one thing. Not what the trader complained about, but what was actually running on the machine at the moment the customer picked up the phone to call us.

Five programs kept showing up over and over and over again. Four out of five were installed on purpose. Nobody snuck them on there. The trader went out and got these programs on his own because he believed they would make his computer faster or safer.

But every single one of them competes with NinjaTrader 8, thinkorswim, TradeStation, or whatever you use for the exact same resources at the exact same moment you need those resources the most. I'll bet you a cup of coffee that number two or number five is open on your machine right now.

And I'll tell you up front: one of these five isn't just eating resources. One of them quietly slows what your processor is allowed to do under load, so your machine gets slower exactly when it's working the hardest. See if you can guess which one as we go.

1. Third-party antivirus programs

There are three big culprits: Norton, McAfee and Avast, or whatever trial was pre-installed on that retail machine you bought at the big box store.

Here's what a real-time virus scanner actually does. Every single time a program reads or writes a file, that scanner steps in front of it, inspects it, and then lets it through. Every time, all day.

Now think about what your platform is doing. NinjaTrader is writing tick data to your disk continuously. thinkorswim is caching chart data. TradeStation is logging what you're doing. Thousands of tiny file operations a minute, and now you've hired a guy to open every single envelope before he hands it to you. Then at some point it decides to run a full system scan, and it doesn't check whether the market is open.

What to run instead

Uninstall Norton or McAfee and run Microsoft Defender Antivirus. It's already built into Windows 11, it's free, it's quiet, and it's the one antivirus that's actually designed to get out of the way of the operating system it lives inside. If you want more on that, I've written before about using Windows Defender on a trading computer.

Then add your NinjaTrader 8 data folder as an exclusion. Click the Start button, type Windows Security, go to Virus and Threat Protection, and find Manage Settings. Scroll down to Exclusions, click Add an Exclusion, pick Folder, and point it at your NinjaTrader 8 or TradeStation data directory.

The whole process takes 30 seconds, and it's the single biggest software tweak on this list.

Is your machine even fast enough in the first place?

Here's the question I get the second I finish that explanation on a support call. "Eddie, if I rip out all of this junk, is my machine actually going to be fast enough, or am I just cleaning up a computer that was never up to the job?"

Fair question, and there's a free way to answer it before you touch anything. I built a CPU benchmark test specifically for traders. You run it on the machine you actually trade on and it gives you a real number that tells you where your processor stands for serious multi-platform trading. Take the free trading CPU benchmark test; it takes about two minutes. For serious trading, you want to see 45,000 or better.

Do that first, then keep going with this list. If that number comes back strong, everything on this list is a reason your computer is lagging.

2. Registry cleaners and PC optimizers

The biggies are CCleaner and Advanced SystemCare, plus any of those tools that pop up and tell you your PC has 4,782 errors.

In 16 years of building trading machines, I have never once, not one time, seen a registry cleaner fix a trading performance problem. What I have seen is a registry cleaner delete a key that thinkorswim needed, and now it won't launch on Monday morning.

The registry is not a junk drawer. It's the phone book Windows uses to find everything. A registry cleaner is a guy with a Sharpie crossing out numbers he doesn't recognize.

And most of these tools install a background service that runs at startup, scans on a timer, and pops up a notification while you're in the middle of a trade.

What to run instead

Nothing. Windows 11 maintains itself. If you want disk space back, use Storage Sense, which is already in Settings under System, then Storage. It's free, it's native, and it won't break your platform.

So that's the one that breaks things. Number three is different. Number three doesn't break anything. It works exactly as advertised, and that's the problem.

3. RAM boosters and so-called memory optimizers

You open Task Manager and see 78% memory used. You panic. You install something that promises to free up RAM, and it delivers. The numbers drop. You feel great.

Here's what actually happened in that half a second. That tool forced Windows to dump data out of fast memory and shove it onto your hard drive, data your platform was about to use. TradeStation and MultiCharts both hold data in memory on purpose instead of hitting the drive every time you scroll.

Empty RAM is wasted RAM. Windows is supposed to keep it pretty full. That's the entire point of having it. So the next time thinkorswim wants chart data, it's not sitting in memory anymore. Your platform has to go fetch it off the hard drive, and you feel it as stutter. You paid money for a program whose only job is to make your computer slower, and then it shows you a green check mark for it.

What to run instead

Buy more RAM. 32GB minimum for a serious multi-platform setup, 64GB if you're running scanners and dozens of charts. There is no software substitute for physical memory. None.

And look, I'm fully aware that RAM prices are now 7 to 800% higher than they were just a year ago, and we can thank the AI data centers for that. There's still no substitute for more of it. If you want the full breakdown, here's my take on the minimum RAM every day trader needs.

4. Cloud sync clients

You know which ones I'm talking about. Dropbox, iCloud for Windows, OneDrive, any of those. These are the ones I see on most machines belonging to traders who came over from a Mac. You migrate over, you install iCloud so your files follow you, and now there's a service sitting in your system tray indexing folders and uploading in the background.

These sync clients are not gentle on your computer. They watch the file system for changes. They compress, they encrypt, they upload, and they're greedy with your upstream bandwidth, the same upstream bandwidth your order has to travel through on its way to your broker.

Your download pipe is huge. Your upload pipe is small. Your order is a tiny packet trying to merge onto a highway that Dropbox just filled up with a 400MB video of your kid's soccer game. If your fills feel late, that's worth ruling out before you blame the broker, and it's a big part of why your internet can sabotage your trades.

What to do instead

Don't uninstall those programs if you actually need them. Just quit them before the market opens. OneDrive, Dropbox and Google Drive all do this, so handle them all the same way: right click the cloud icon in your system tray and choose pause syncing for two hours before the open.

Or even better, put it on a different machine entirely. Your trading computer should do one job, and that's trade.

5. RGB and fan control suites

This is the one I warned you about at the top. The one that reaches into your processor and tells it to back off.

I'm talking about programs like Corsair iCUE, ASUS Armory Crate, MSI Center and Razer Synapse. These come pre-bundled with gaming hardware, and a lot of traders end up on gaming machines, so the software comes along for the ride. Armory Crate alone can install five or six separate background services. iCUE holds RAM to animate the lights on your memory sticks. There is a program running on your machine right now whose job is to make your RAM glow purple.

But the lights aren't what cost you the money. These suites ship with performance profiles: quiet modes, silent modes, whatever the manufacturer calls them. Those profiles cap your fan speed. And when you cap the fans, the processor has nowhere to send its heat, so it throttles itself down. It slows itself down to stay cool.

That means your CPU slows down at the exact moment volume spikes and every chart on your desk is redrawing at once. You get no information, nothing on the screen that tells you it's happening. You just feel your machine get heavy, and you blame your data feed. It's one of the quieter reasons a trading platform freezes at the worst possible time.

What to do instead

Set your lighting up one time, set your fan curve once, then uninstall the software suite. The settings save to the hardware, so your lights stay on and the four background services do not.

The five programs and what to run instead

Program	What it costs you	Run this instead
Third-party antivirus	Inspects every file read and write, then full scans during market hours	Microsoft Defender plus a folder exclusion for your platform data
Registry cleaners / optimizers	Deletes keys your platform needs, plus a background service and pop-ups	Nothing. Use Storage Sense for disk space
RAM boosters	Dumps chart data out of memory onto the drive, so you get stutter	32GB minimum, 64GB with scanners and dozens of charts
Cloud sync clients	Fills the small upload pipe your order rides to your broker	Pause syncing two hours before the open, or move it to another machine
RGB and fan control suites	Quiet fan profiles make the CPU throttle under load	Set lights and fan curve once, save to hardware, uninstall the suite

What all five have in common

Third-party antivirus, registry cleaners, RAM boosters, cloud sync clients, RGB suites. Notice what they share. Every one of them promised to help you. Not one of them was installed by accident.

And about that coffee, if number two or number five was sitting on your machine, that's the bet, and you've already paid for it in slow executions. If all five came back clean, that's awesome, because in hundreds of support calls this year I can count on one hand the traders who were clean of all five.

Your homework tonight after the close

Press Ctrl + Shift + Esc all at the same time. That opens Task Manager. Click the Startup Apps tab on the left. Go down the list and be ruthless. If it isn't a trading platform, a browser, or a driver, right click it and hit Disable. Then restart the machine.

Your machine will boot faster and you'll have more headroom at 9:30 tomorrow than it had this morning. While you're at it, run the free benchmark test for traders so you know whether you're cleaning up a fast machine or propping up a slow one.

And if you want the full picture on what actually belongs on a trading machine, what specs matter, what's just marketing nonsense, and what to look for before you spend a dollar, grab my free Complete Guide to Trading Computers. Put in your email address and it gets sent to you instantly. It's completely up to date for 2026, and it pairs well with my list of programs you should never install on a trading PC.

Frequently Asked Questions

Is Microsoft Defender really enough protection for a trading computer?

Yes. It's already built into Windows 11, it's free, it's quiet, and it's the one antivirus actually designed to get out of the way of the operating system it lives inside. Uninstall Norton or McAfee, let Defender do the job, and add your NinjaTrader 8 or TradeStation data folder as an exclusion so it isn't inspecting every tick file your platform writes.

Why does my computer feel slow only when the market gets busy?

That's the pattern I see with RGB and fan control suites. Their quiet or silent performance profiles cap fan speed, the processor has nowhere to send its heat, and it throttles itself down to stay cool. So your CPU gets slower at the exact moment volume spikes and every chart on your desk redraws at once. Nothing on screen tells you it's happening, so most traders blame the data feed.

Should I uninstall OneDrive and Dropbox from my trading PC?

Not if you actually use them. Just quit them before the market opens. Right click the cloud icon in your system tray and choose pause syncing for two hours before the open. Better still, put cloud sync on a different machine entirely, because your trading computer should do one job and that's trade.

How much RAM do I need if I stop using a memory optimizer?

32GB is the minimum for a serious multi-platform setup, and 64GB if you're running scanners and dozens of charts. Empty RAM is wasted RAM. Windows is supposed to keep it fairly full so your platform can pull chart data out of memory instead of off the drive. There is no software substitute for physical memory.

Does CCleaner speed up a trading platform?

In 16 years of building trading machines, I have never once seen a registry cleaner fix a trading performance problem. What I have seen is one delete a registry key thinkorswim needed, so the platform wouldn't launch on Monday morning. Windows 11 maintains itself, and Storage Sense in Settings will recover disk space without breaking anything.

What's the fastest way to clean up my startup programs?

After the close, press Ctrl + Shift + Esc to open Task Manager, click Startup Apps on the left, and disable anything that isn't a trading platform, a browser, or a driver. Restart the machine. It boots faster and you have more headroom at the open the next morning.