The question lands on the workbench with almost every machine that comes through in 2026: the laptop works, Windows 10 is end-of-life, and the owner has roughly £30 to spend. That budget opens exactly three doors. Pay Microsoft for a year of Extended Security Updates. Buy a 240 GB SATA SSD and fix the performance bottleneck that makes the machine feel old. Or spend nothing on hardware and invest the time in switching to a lightweight Linux distribution.
Each option costs about £30 in either money or equivalent time. Each produces a genuinely different outcome. And the common advice - "just install Linux" or "just pay for ESU" - usually ignores the variables that actually matter: what state the hardware is in, how long you need the machine to last, and what you are realistically willing to learn. This note documents what we found when we priced all three options honestly, tested them on real hardware, and calculated the cost per year of useful life. For more testing notes, visit the Lab Notes hub.
What Was Tested
Our reference machine for this analysis is a 2014 Lenovo ThinkPad T440 - Core i5-4300U, 8 GB RAM, 500 GB mechanical hard drive, 1600x900 display. It is a representative example of the machines that arrive on the bench most frequently: decent processor, adequate RAM, storage that was never upgraded. The machine boots Windows 10 in 78 seconds, takes 14 seconds to open Firefox, and stutters noticeably when more than two applications are running simultaneously.
We tested three paths, each starting from the same baseline:
- Option A - Windows 10 ESU: Enrolled in the Extended Security Updates programme at £30 per device for the first year. No hardware changes. The machine continues running Windows 10 with monthly security patches.
- Option B - SSD upgrade: Replaced the 500 GB HDD with a 240 GB Kingston A400 SATA SSD (£22 at the time of testing) plus a £6 USB-to-SATA cloning cable. Cloned the existing Windows 10 installation. Total spend: £28.
- Option C - Switch to Linux: Downloaded Linux Mint 22 Xfce, created a bootable USB with Ventoy, installed on the existing HDD. Software cost: £0. Time investment: approximately 3 hours including setup, Wi-Fi configuration, and basic application installation.
What Surprised Us
The results were less straightforward than the usual advice suggests. Three findings stood out:
ESU changed nothing about daily performance
After enrolling in ESU, the machine felt identical. Same 78-second boot. Same sluggish multitasking. Same disk-at-100% pattern in Task Manager during the first five minutes after login. ESU delivers security patches, not performance improvements. The monthly updates actually made the machine temporarily slower on patch days because Windows Update is disk-intensive on a mechanical drive. The machine was exactly as secure as before ESU ended - but it was not a single second faster.
The SSD was transformative even without changing the OS
After cloning to the SSD, boot time dropped from 78 seconds to 19 seconds. Firefox launched in 2 seconds instead of 14. The disk-at-100% bottleneck disappeared entirely. The same Windows 10 installation, with the same set of applications and the same user profile, felt like a different machine. This was not unexpected - our SSD testing notes document the pattern consistently - but the magnitude of the difference still stands out when you see it side by side with the ESU-only result.
Linux on the HDD was faster than Windows on the HDD, but not by the margin people claim
Linux Mint Xfce on the original mechanical drive booted in 38 seconds - half the Windows time but still noticeably slow. Application launches were faster. RAM usage at idle was 600 MB instead of 2.1 GB. But the mechanical drive still created a bottleneck during simultaneous application use. The experience was better than Windows on the HDD, noticeably, but it was not the "feels like a new machine" transformation that the SSD produced. Linux on the HDD felt like a competent older machine. Windows on the SSD felt modern.
Where the Common Advice Falls Apart
The three standard recommendations you find online each have a blind spot:
"Just pay for ESU"
This advice treats the problem as purely a security question. It is not. Most people asking this question are frustrated with how their machine performs, not just worried about patches. Paying £30 for ESU on a machine with a mechanical drive is paying for twelve months of security on a computer that is unpleasant to use. It makes sense only when the machine is genuinely temporary - a bridge to replacement within the year. For the full ESU details, see our Windows 10 ESU in 2026 guide.
"Just install Linux"
This advice underestimates the time cost and overestimates the performance gain on a mechanical drive. Linux is genuinely lighter than Windows, but the person giving this advice usually has Linux experience and is not accounting for the hours a newcomer spends troubleshooting Wi-Fi drivers, learning the software centre, adjusting to a new desktop, and discovering that their printer needs a different driver. For someone who is comfortable and curious, it is a reasonable project. For someone who just wants their laptop to work, it is an afternoon of frustration before the benefits appear. Our lightweight Linux guide covers the practical steps honestly.
"Just buy an SSD"
This is the closest to universally good advice, but it has two caveats. First, if the machine has only 2 GB of soldered RAM, the SSD improves boot and launch times but does not fix the RAM pressure that makes multitasking painful. Second, the SSD does not solve the security question - Windows 10 without ESU is still unpatched. The SSD is a performance fix, not a complete strategy. Pairing it with either ESU (short term) or Linux (long term) addresses both problems. See our SSD upgrades guide for the hardware side.
Cost per Year of Useful Life
This is the metric that makes the decision clearer than any feature comparison. Each option has a cost and a realistic lifespan of benefit. Dividing one by the other reveals the actual value.
| Option | Upfront Cost | Useful Life Added | Cost per Year | Performance Gain |
|---|---|---|---|---|
| ESU only (no hardware change) | £30 | 1 year (patches expire) | £30/year | None |
| SSD upgrade (keep Windows 10) | £25-28 | 3-5 years (drive lifespan) | £6-9/year | Transformative |
| SSD + ESU (one year of patches) | £55-58 | 1 year patched + years of SSD | ~£14/year (blended) | Transformative |
| Linux on existing HDD | £0 + 3-4 hours | 2-3 years (OS stays supported) | £0 + time | Moderate |
| SSD + Linux | £25-28 + 3-4 hours | 4-6 years | £5-7/year | Best outcome |
The numbers are clear. ESU is the most expensive option per year of benefit. The SSD alone is four to five times better value. Linux on the HDD is free in money but limited in lifespan because the mechanical drive will eventually fail or become the bottleneck you cannot tolerate. The SSD plus Linux combination delivers the lowest cost per year and the best performance outcome.
For the benchmark data behind these performance claims, our Windows 10 ESU vs Windows 11 vs Linux benchmark covers the OS comparison on identical hardware.
Pass/Fail Decision Logic
The right choice depends on the hardware condition and the owner's situation. Use this matrix:
| Your Situation | Best Option | Why |
|---|---|---|
| Machine is temporary (replacing within 12 months) | ESU only | Cheapest bridge. No hardware investment on a machine you are retiring. |
| Good hardware, HDD bottleneck, comfortable with Windows | SSD upgrade + ESU for year one | Transforms performance now. ESU covers security during the transition. |
| Good hardware, willing to learn Linux | SSD + Linux | Best cost per year. Best performance. Long-term security via OS updates. |
| 4 GB+ RAM, SATA bay available, tight budget | SSD upgrade first | Biggest single improvement. Decide on OS later. |
| 2 GB soldered RAM, no SSD bay (eMMC) | Linux on existing storage or retire | Hardware cannot be meaningfully upgraded. Linux is lighter but limited. |
| Decent hardware, zero interest in learning Linux | SSD + ESU, then reassess in 12 months | Performance fix plus security. Gives you a year to decide on next steps. |
The Honest Recommendation
After running this analysis across multiple machines, our position is clear: the SSD is almost always the right first move. It is the only option that changes how the machine actually feels to use. ESU does not make the computer faster. Linux on a mechanical drive is faster than Windows on a mechanical drive, but it is still a machine bottlenecked by a spinning disk.
If you have £30 and can only do one thing, buy the SSD. If you have £30 and a weekend, buy the SSD and install Linux. If you absolutely cannot open the laptop and the HDD is the only option, Linux is the better path than ESU unless you need specific Windows software. And if the machine is truly temporary - you know you are replacing it within the year - ESU is a reasonable holding pattern.
The one scenario where ESU makes clear sense without an SSD is a business or institutional setting where the machines are managed centrally, users cannot change the OS, and the IT budget for hardware is zero. In that case, ESU is the only option that maintains the security posture without touching the hardware or retraining users. For everyone else, the SSD changes the equation fundamentally.
Practical Next Step
Open the laptop's back panel (most business laptops have a single service door or a few Phillips screws) and identify the storage interface. If you see a 2.5-inch SATA bay with a mechanical drive, you have the clearest upgrade path in computing. A 240 GB SSD, a USB cloning cable, and 45 minutes of your time will produce a bigger improvement than any software change.
Start with our SSD upgrades guide for the step-by-step hardware process. If you decide to pair the SSD with a Linux installation, our lightweight Linux guide covers distribution selection and setup. If you want to see the raw benchmark numbers that underpin this analysis, the OS comparison benchmark has the data.