BIOS Check for Windows
A free, read-only check for BIOS chip reads: are two reads the same, is the layout complete, is the BIOS code intact, is the board's own data there? Nothing is written to the chip and nothing leaves your PC.
How it works
Open two BIOS reads to compare them, or one to check it.
It tells you if the read is good before you write anything.
Free on the Microsoft Store, the only place to get it. No account, no ads. Windows 10 (version 1809 or later) and Windows 11, 64-bit.
How it works
- 1Pick
- 2Compare
- 3Layout
- 4Health
- 5Identity
- 6Verdict
Choose one or two reads of the chip, made with your programmer - or try a built-in demo sample.
What it checks
Show more
- Two reads of the same chip - compared byte by byte. If they differ, the clip slipped or a pin had bad contact: read again before you trust it.
- The flash layout - Intel descriptor regions or AMD layout, the chip size and blank areas.
- The BIOS code - firmware volumes, files, checksums and compressed parts.
- The settings store (NVRAM) - a nearly full store is a known reason a board won't start.
- Intel ME, and whether the EC firmware is there - an empty EC area on a board that keeps it in this chip means no power-on. (BIOS Check doesn't verify the EC firmware code itself.)
- The board's own data - network address and Windows key, shown in part only (first and last two characters).
- Graphics-card BIOS files - recognised and judged on their own terms, never called damaged by mistake.
It can check EC chip reads too, but only to compare two EC chip reads: BIOS Check compares them byte by byte, so you know the read is stable before you edit or flash it. If they differ, it shows where. It doesn't judge the EC code itself: two matching EC reads get "not a system BIOS", never "healthy" or "damaged". We recommend using it for BIOS.
A clear verdict
Healthy, unstable reads, damaged, wrong size, blank or "not a system BIOS" - each with what to do next, step by step. Save a PDF report for your job folder or your customer.
Read-only and private
- It never writes to a chip, never changes your files and never builds a file to program.
- It never goes online: no account, no statistics, no update checks - nothing is uploaded. Updates come through the Microsoft Store.
- Details: BIOS Check privacy.
Who it's for
For technicians who read BIOS chips with a programmer, and for anyone who wants to know if the fault is the BIOS or something else on the board before changing parts.
BIOS Check is a diagnostic aid. "Healthy" doesn't promise that a board will start and "damaged" doesn't prove that a chip is faulty - check with two reads and your own measurements. It doesn't unlock or bypass anything. Not affiliated with Intel, AMD, NVIDIA or any BIOS, chip or board maker; their names only describe what the app can read.
Free, private, built to keep devices alive
In 15 years at the bench we saw too many good devices go in the bin because nobody found the real fault. Our Hardware Specialist and Senior Repair Technicians built these tools so more devices get fixed instead of thrown away. If they helped you, a review helps the next person find them, and your support pays for the next fix.
> goal: Less e-waste · Greener Earth
We find the real fault before parts are replaced, so fewer working batteries, boards and devices end up as e-waste.