PC Check
The other half of the scanner. This one runs on Windows itself, so it can read the things a browser is not allowed to see — how healthy your drive really is, how much battery you have actually lost, and what has been going wrong in the background.
Download for WindowsWhat it reads that a browser cannot
Drive health (SMART)
Reallocated sectors, uncorrected read and write errors, SSD wear percentage, power-on hours and the drive's own failure prediction. This is the one that matters — a drive can pass every other test on this site and still be days from failing.
Battery wear
Design capacity against what the cell actually holds now, so you get real wear as a percentage rather than just today's charge level. The question people actually ask.
Memory layout
Every slot, its size, speed and manufacturer. Finds single-channel memory — one stick where two would fit — which is a cheap, noticeable speed-up and invisible everywhere else.
Error history
Disk errors, blue screens, hardware faults and unexpected shutdowns over the last 30 days, with dates. Turns “it's been doing it for a while” into evidence.
Driver problems
Devices Windows has flagged, and graphics drivers old enough to be causing the stutter and video trouble you have been living with.
Protection status
Whether antivirus is registered and actually running, how old Defender's definitions are, tamper protection, and whether the drive is encrypted. It does not scan for malware — no tool this size honestly could.
Real benchmarks
Processor single-thread and all-core, memory bandwidth, and genuine disk I/O — sequential read and write plus random 4K reads. That last number is the one that separates a healthy SSD from a mechanical drive, and it is usually the whole explanation for a machine that takes two minutes to boot.
Overheating test
Run with --full and it loads every core for 30
seconds, watching throughput and clock speed the whole way. A machine with dust in
the fans or dried thermal paste falls off a cliff partway through — the thing that
makes a laptop fine for ten minutes and useless after.
Windows 11 readiness
TPM version and state, Secure Boot, memory, disk and processor, with the specific reason it is blocked. Very often it is a BIOS setting switched off rather than hardware that cannot cope — which is a two-minute fix, not a new computer.
Which one should I run?
| Web scanner | PC Check | |
|---|---|---|
| Runs on | Anything with a browser | Windows 10 & 11 |
| Download needed | No | Yes, 34 MB |
| Processor & memory benchmarks | Yes | Yes |
| Graphics benchmark | Yes | No |
| Screen, camera, mic, speakers | Yes | No |
| Overheating stress test | Yes | Yes, with clock tracking |
| Real disk I/O (random 4K) | No | Yes |
| Drive SMART health | No | Yes, full NVMe health log |
| Battery wear | No | Yes |
| Memory slot layout | No | Yes |
| Windows error history & crash dumps | No | Yes |
| Windows 11 readiness | No | Yes |
They answer different questions, so run both if you are troubleshooting properly. Start with the web scanner — it takes fifteen seconds and needs nothing installed.
Before you download
Windows will warn you about this file
It is not code-signed yet, so SmartScreen will show a blue “Windows protected your PC” box the first time you run it. That warning is Windows telling you it does not recognise the publisher — which is true, and it would say the same about any small developer's first release. To run it anyway: click More info, then Run anyway.
You should be cautious about downloaded programs, so here is how to check this is the file I published rather than something that replaced it. Open PowerShell in your Downloads folder and run:
Get-FileHash .\JbTecWiz-PC-Check.exe -Algorithm SHA256
It should print:
1DB6FCD7FC8CC772071BF95425F08E0415EAEFA9BC3E864C02810306DCF0A676
If it does not match, do not run it — tell me instead.
What it does with your data
- Everything is read and written on your machine. It makes no network connections at all.
- It saves one HTML file to your desktop and opens it. Nothing is uploaded, ever.
- If you want me to see it, you email that file to me. That is the only way it leaves your PC.
- It reads only hardware and error information — no documents, no browsing history, no passwords.
Run it as administrator for the full check
It works fine double-clicked, but three checks need administrator rights: the drive's SMART counters, its failure-prediction flag, and BitLocker status. Without them the drive section falls back to Windows' own health rollup, which is a much weaker test — and the report says so plainly rather than reporting a reassuring pass it did not earn.
To get everything: right-click the downloaded file → Run as administrator.
Then what?
It writes a report to your desktop and opens it. If it found something, email that file to JbTecWiz@outlook.com and I can see the whole picture without the machine in front of me — which usually saves a visit, and always saves a lot of back and forth. Diagnostics are £30 and I cover Taunton and the surrounding area.