TL;DR: A slow business PC is usually a settings problem or a spec problem, and you can tell which in about twenty minutes. Microsoft’s ongoing Windows 11 performance work is real but won’t rescue a 2019 laptop with 8GB of RAM. The bigger decision is your Windows 10 machines, since extended security update pricing doubles in October 2026.
The pause before a folder opens. The half second before a window responds. Clicking something twice because nothing happened the first time.
None of it stops anyone working, which is why it never gets fixed. It’s an irritation rather than a ticket, so it accumulates quietly until somebody says the computers are slow and everyone agrees without knowing what to do about it.
Microsoft has been working on this from their end, cutting the startup overhead in the framework behind File Explorer, Settings, and other built-in apps. That’s real work and the right priority. It will also do almost nothing for a five-year-old machine with 8GB of RAM and a security agent it was never specced for.
Here’s the useful reframe. Almost nothing about that PC got slower. What changed is what you’re asking it to run.
Why does a PC that worked fine last year feel slow now?
Because the workload grew and the machine didn’t. A laptop specced in 2021 for Office and a browser now runs an endpoint security agent, Teams, a VPN client, a backup agent, and thirty browser tabs. Each was a reasonable decision. Together they exceed what the hardware was bought to do.
Say that plainly to your team, because “the computers are slow” usually gets heard as a complaint about IT. It isn’t. It’s the predictable result of adding software to a fixed amount of memory over four years, and it’s why a machine feels fast for six months after every rebuild.
It also means two different problems are wearing the same costume, and the fix for one does nothing for the other.
The settings nobody changed
Start here, because it’s free and resolves a surprising share of complaints. These are defaults, not mistakes, and almost nobody knows they’re adjustable.
- Power mode. Windows ships desktops and docked laptops on Balanced. Set anything that stays plugged in to Best Performance and some machines feel different immediately.
- Startup apps. Open Task Manager and check the Startup tab. Most business machines have six to ten things launching at login that nobody chose.
- Two security products. A machine came with a trial antivirus, a proper endpoint tool got deployed later, and the trial was never removed. Two products scanning the same files fight each other and the machine crawls.
- Disk space. Under about 10% free and Windows slows down noticeably. Check it before assuming anything else.
- Storage type. If the machine still has a spinning hard drive rather than an SSD, that’s the whole answer. Nothing else you change will matter much.
Twenty minutes across those five will tell you whether you have a configuration problem or a hardware problem. Do it before anyone quotes you for new machines.
When is it actually the hardware?
When you hit two of these three: less than 16GB of RAM, a mechanical hard drive instead of an SSD, or a processor older than roughly 2018. At that point tuning stops paying.
Sixteen gigabytes is the realistic floor for a business machine in 2026, not the official Windows 11 minimum. That minimum assumes a machine running Windows and little else. Yours runs Windows, a security stack, a communications platform, and whatever line of business software you depend on.
One note on the numbers you’ll see elsewhere. Nearly every article on this topic cites productivity figures about aging PCs from studies eight to ten years old, commissioned by hardware manufacturers. Skip them and use the one below, which has a date and a price attached.
The bigger question hiding under “my PC is slow”
Windows 10 reached end of support on October 14, 2025. Machines still on it kept working, which is why so many businesses did nothing. Nothing broke, so nothing happened.
What changes is the price of keeping those machines patched. Microsoft’s Extended Security Updates program is the only route to Windows 10 security patches now, and for businesses it runs $61 per device for year one. Year one ends October 13, 2026. After that, the price doubles each year, to $122 and then $244, with the program closing in 2028.
Two details make waiting expensive. The licenses are cumulative, so enrolling later means buying the earlier years too. And ESU buys security patches only: no features, no performance work, no support. You’re paying an escalating fee for a machine that stays exactly as slow as it is today.
Run the arithmetic on your own fleet. Fifteen Windows 10 machines carried through the full program runs north of $6,000 in patching alone, money that buys nothing but time. Against that, a replacement plan starts looking like the cheaper option, which is not how these conversations usually go. Machines running an unsupported operating system are also the first thing an insurer or a client security questionnaire asks about.
Most machines bought after 2018 can move to Windows 11 at no licensing cost, so the first step is finding which of yours qualify. That’s a report, not a project, and any competent managed IT provider can produce it in a day.
Will Microsoft’s Windows 11 performance work help?
A little, and not where you need it. Microsoft’s recent focus on responsiveness, cutting background work when apps launch and shortening the delay between an action and a reaction, is real and welcome. It shaves fractions of a second off common actions all day.
That’s meaningful on adequate hardware. On a machine short on memory it’s invisible, because your bottleneck isn’t the operating system’s efficiency. It’s four programs competing for RAM that ran out an hour ago.
Take the improvements as a reason to be on Windows 11, not a reason to keep a machine another year. They make good hardware feel better. They don’t make old hardware adequate.
How do you decide what to replace?
Set a policy instead of arguing machine by machine. Pick a replacement age, usually four years for laptops and five for desktops, set a minimum spec for new purchases, and budget to replace roughly a quarter of your fleet every year.
The per-machine argument is what makes this painful. Every individual replacement looks postponable because the machine still turns on, so the fleet ages together until you face one enormous bill in a year you didn’t plan for it.
A rolling quarter smooths the spend, keeps everything under warranty, and ends the debate. It also means “can we get one more year out of this” stops depending on who’s asking. If your provider has never brought you a device age report or raised the Windows 10 deadline, that’s worth a conversation about what you’re paying for.
The takeaway
Check the settings first, because a fair share of “slow” is a default nobody changed and it costs nothing to rule out. Then check the specs, and stop tuning once a machine fails two of the three tests.
Then handle the real decision. Find out which machines are still on Windows 10 and which of those move to Windows 11 for free, before October’s pricing change makes the stopgap more expensive than the fix.
If you’d like someone to pull that report and say plainly which machines are worth keeping, book a short call. You’ll leave with a list.
Frequently Asked Questions
Why do business computers get slower over time?
The hardware doesn’t degrade much. The workload grows. A machine specced a few years ago now runs a security agent, a communications platform, a backup client, and a browser holding dozens of tabs, all competing for memory sized for a lighter load.
How much RAM does a business PC need in 2026?
Sixteen gigabytes is the practical floor for most office work, well above the official Windows 11 minimum. Machines running design software, large spreadsheets, or many applications at once should be specced at 32GB.
How often should a business replace computers?
Roughly every four years for laptops and five for desktops, replacing about a quarter of your fleet annually. A rolling schedule keeps machines under warranty, smooths the spend, and avoids replacing everything at once during a year you didn’t budget for it.
What happens if we stay on Windows 10?
The machines keep running but stop receiving free security patches, which ended in October 2025. Extended Security Updates cost $61 per device for the first year, double each year after, and are cumulative, so enrolling late means paying for the years you skipped.
Can our current computers run Windows 11?
Most business machines bought after 2018 can, provided they have TPM 2.0 and Secure Boot and a recent enough processor. The upgrade carries no licensing cost. An inventory report will tell you exactly which of your machines qualify.
Get a Straight Answer on Your Hardware
Guessing about which computers to replace is expensive in both directions. Z-JAK helps Louisville businesses inventory what they have, sort out which machines can move to Windows 11, and build a replacement schedule that fits the budget rather than fighting it, alongside the rest of the IT and security work that depends on it. Start a conversation and we’ll look at your fleet.