How to Update Your BIOS Safely (and When You Shouldn't)
Updating a BIOS takes about five minutes. Recovering from a bad one can take a lot longer. Here's how I decide whether a desktop needs the update at all, the order I do it in on ASUS, MSI, Gigabyte, Dell and HP machines, and what to do if a flash stops halfway. I do all the desktop repair at my Somerville, NJ bench myself, and failed BIOS updates come across my counter more often than you'd think.
Should You Update Your BIOS at All?
If the PC runs fine, the honest answer is usually no.
The BIOS (on anything recent, technically UEFI firmware) is the small program on the motherboard that starts the processor, trains the memory and hands off to Windows. An update rewrites that chip. Intel's own guide says BIOS updates aren't routine maintenance, usually won't make games run faster, and that board makers advise against updating a system that's working normally. I agree with that. Most of the BIOS jobs I see started as "I figured I'd update everything."
There are good reasons to do it, though, and a couple of them are common right now.
✅ Update when
- You're installing a newer CPU and the board's support list says it needs a newer BIOS (see my CPU upgrade page)
- New memory won't run at its rated speed, or the board won't POST with it
- The release notes fix a crash, boot or stability problem you actually have
- The manufacturer flags a security fix for your exact model
- You need a feature the current version lacks, such as Resizable BAR or TPM support for Windows 11
⛔ Leave it alone when
- The PC is stable and nothing in the release notes applies to you
- You're hoping for more FPS
- Your power is unreliable (storms, flickering lights, no battery backup)
- You can't confirm the exact board model and revision
- It's a work machine you can't be without for a day if something goes wrong
Before You Flash: Five Things I Check First
Most failed updates I see trace back to one of these.
- The exact model and revision. Press Windows + R, type
msinfo32, and read BaseBoard Manufacturer, BaseBoard Product and BIOS Version/Date. A "Wi-Fi" and a non-Wi-Fi version of the same board can take different files, and Gigabyte boards also have a revision number printed on the board. On a Dell, HP or Lenovo, use the service tag or serial number instead. My how to check PC specs guide shows where to find all of it. - The release notes. Some updates require an older version to be installed first, and some drop support for older CPUs. Read the notes for every version between yours and the newest one.
- Your BitLocker recovery key. A firmware change can make Windows ask for the 48-digit recovery key on the next boot. Find and save it before you start. My BitLocker recovery key page covers where it's stored.
- Your settings. An update resets the BIOS to defaults. Write down your XMP or EXPO profile, fan curves and boot order so you can put them back.
- Steady power. A desktop has no battery, so a power blip mid-flash is the classic way to ruin a board. Don't update during a storm, and if you have a battery backup, plug the PC into it. Laptops stay on the charger the whole time.
How to Update BIOS From a USB Drive, Step by Step
The method built into the BIOS is the one I use on custom PCs, because Windows isn't running while it flashes.
Confirm the board and current version
Use msinfo32 as above, then find that exact model on the manufacturer's support site and compare versions. If you're already on the newest one, you're done.
Download and extract the file
Download the BIOS from the model's support page and extract the compressed folder. Keep the manufacturer's instructions open on your phone, since you won't have a browser once you're inside the BIOS.
Prepare a FAT32 USB flash drive
Format a USB flash drive as FAT32 (formatting erases it) and copy the BIOS file or folder to the root of the drive. MSI warns that files left in subfolders can cause read errors. A small, plain drive works better than a large one.
Enter the BIOS
Restart and tap Delete (most custom boards) or F2 during startup. If the PC boots too fast, go through Windows: Settings, Recovery, Advanced startup, Restart now, then Troubleshoot, Advanced options, UEFI Firmware Settings.
Run the flash tool and don't touch anything
Open the board's built-in tool (EZ Flash on ASUS, M-Flash on MSI, Q-Flash on Gigabyte, Instant Flash on ASRock), pick the file and confirm. The screen may go black and the PC may restart more than once. Don't power it off, unplug the USB drive or press reset until it finishes.
Reset, re-apply and verify
When it boots back to the BIOS, load optimized defaults, turn XMP or EXPO back on, check the boot drive is first in the boot order, and confirm the version number on the main screen. Then boot to Windows and have the BitLocker key ready in case it asks.
BIOS Update Tools by Brand
Same idea everywhere, different names, and a few boards with a safety net built in.
| Brand | Update from inside the BIOS | Recovery or no-CPU option | Worth knowing |
|---|---|---|---|
| ASUS | EZ Flash | USB BIOS FlashBack on supported boards: rename the file with ASUS's BIOSRenamer tool, use the marked FlashBack port, hold the button about three seconds | The PC stays shut down but plugged in. ASUS says it can take up to eight minutes; the light goes out when it's done |
| MSI | M-Flash (press Delete at startup) | Flash BIOS Button on supported boards, and only with no CPU installed | FAT32 drive, extracted folder at the root of the drive |
| Gigabyte / AORUS | Q-Flash | Q-Flash Plus on supported boards: file renamed to gigabyte.bin, dedicated USB port, no CPU, memory or graphics card needed. Many boards also carry a backup DualBIOS chip | Match the board revision (rev 1.0, 1.1 and so on) before downloading. Gigabyte's reflash guide covers the in-BIOS and Windows tools |
| ASRock | Instant Flash | BIOS Flashback on some boards | Check the manual for which port the flashback feature uses |
| Dell | F12 one-time boot menu, BIOS Update option, from a FAT32 USB drive | SupportAssist, or the standalone update downloaded with your Service Tag | Dell's BIOS guide notes updates can also arrive through Windows Update as Dell firmware. Downgrades can be blocked after security fixes |
| HP and Lenovo | Manufacturer's update utility in Windows | Varies by model | Use the serial number on the support site and keep laptops on the charger |
Flashback-style features are on many current boards but not all of them. Check your board's spec page or manual before you count on one.
BIOS Update Stuck or Failed? What to Do Next
Don't start pulling parts. Go in this order.
If it looks frozen, wait. A board that's still writing the chip can sit on a black screen or a progress bar that doesn't move. Give it a full 15 minutes before you assume anything. Cutting power at this point is what actually causes the damage.
If it rebooted and nothing appears, check the debug LEDs on the motherboard. A first boot after an update often retrains the memory, which can look like a dead PC for a few minutes. My motherboard debug LED and beep code guide decodes what each light means.
If the board really won't POST, the recovery features in the table above are the next step: FlashBack on ASUS, the Flash BIOS Button on MSI, Q-Flash Plus or the backup BIOS on Gigabyte. They rewrite the chip from a USB drive without needing the system to boot.
If none of that works, I don't do chip-level repair on desktop boards. The fix at that point is my motherboard replacement service, and I'll tell you up front whether a new board makes sense against the age of the rest of the machine.
What I See on the Bench in New Jersey
Composite examples, built from the kinds of BIOS jobs that come across my Somerville counter.
A new CPU in an older board. A Bridgewater customer bought a newer processor for his two-year-old board, sold the old chip, and got a black screen. The board shipped with a BIOS that predated the new CPU. It had a flashback port, so I updated it with no processor installed, then dropped the new chip in. It booted on the first try.
An update during a thunderstorm. A Hillsborough office desktop lost power halfway through an update that Windows had started on its own. No backup BIOS on that model and no USB recovery option, so it needed a new board. The files on the drive were untouched, and they went onto the replacement with nothing lost.
"I updated everything" after a clean install. A Piscataway gamer flashed the newest BIOS to chase a few more frames. The update reset his memory to its default speed, and he thought the upgrade had made the PC slower. Turning EXPO back on fixed it.
If a BIOS update left your desktop dead, or you'd rather not risk it yourself, bring the tower in. A PC that won't boot goes through the $75 diagnostic ($149 for custom-built and boutique PCs), credited toward the repair when you approve it. If you only want the update done on a working PC, I quote it at drop-off. My custom PC repair and upgrade service covers new CPUs and memory that need a newer BIOS first.
📞 Call (908) 428-9558Drop-off shop at 75 N Bridge St, Somerville NJ · Mon-Fri 10-5, Sat 9-2
Directions to Dave's Computers in Somerville, NJ
Downtown Somerville, one block off Main Street, behind Bank of America.
From Bridgewater
Route 22 or Route 202/206 to the Somerville Circle, then Route 28 east (West Main Street) into downtown. Left onto N Bridge St.
Open in Google MapsFrom Hillsborough
Route 206 north into Somerville, right onto West Main Street, then left onto N Bridge St.
Open in Google MapsFrom Bound Brook
Route 28 west straight into downtown Somerville. Right onto N Bridge St.
Open in Google MapsFrom Piscataway
I-287 north to Exit 17 (Route 202/206 south), then Route 28 east into downtown Somerville.
Open in Google MapsFrom Flemington
Route 202 north to the Somerville Circle, then Route 28 east into downtown. Left onto N Bridge St.
Open in Google MapsFrom Princeton
Route 206 north through Montgomery and Hillsborough into Somerville. Right onto West Main Street, then left onto N Bridge St.
Open in Google MapsTimes are typical drives outside rush hour. Call 908-428-9558 before a long drive if you want to confirm I'm at the counter.
BIOS Update Questions From NJ Customers
The ones I get by phone before the tower ever reaches the counter.
Should I update my BIOS if my PC is working fine?
Usually no. Intel's guidance is that BIOS updates are not routine maintenance and that board makers advise against updating a system that runs normally. Update when the release notes fix a problem you actually have, when you need support for a new CPU or memory, or when the manufacturer flags a security or stability fix for your model.
How do I check my current BIOS version?
Press Windows + R, type msinfo32 and press Enter. BIOS Version/Date shows the version you are running, and BaseBoard Manufacturer and BaseBoard Product show the exact motherboard model. Compare that version with the newest one on the manufacturer's support page for that exact model.
Can a BIOS update brick my motherboard?
It can if power is lost or the system crashes while the BIOS chip is being written, or if the file is for a different board. Many current desktop boards have a recovery path, such as ASUS USB BIOS FlashBack, MSI's Flash BIOS Button or Gigabyte Q-Flash Plus and DualBIOS, that can rewrite a damaged BIOS from a USB drive. Boards without one usually need replacement.
How long does a BIOS update take?
The flash itself usually takes about five minutes, and ASUS says its FlashBack method can take up to eight. The board may restart more than once and sit on a black screen while it does. Leave it alone until the manufacturer's tool says it is done or the indicator light goes out.
Do I need a BIOS update for a new CPU?
Often yes. A board that shipped before your processor existed may not recognize it until the BIOS is updated. Check the board's CPU support list for the minimum BIOS version. If the old CPU is gone, a board with a flashback feature can be updated with no CPU installed; otherwise the update needs a supported CPU in the socket first.
Will a BIOS update trigger BitLocker recovery?
It can. A firmware change can make Windows ask for the 48-digit BitLocker recovery key on the next boot. Find and save that key from your Microsoft account before you update. Dell notes that it cannot retrieve the key for you, and neither can a repair shop.
How much does it cost to have a BIOS problem fixed in New Jersey at Dave's Computers?
A desktop that won't boot after a BIOS update goes through the diagnostic: $75 for a Dell, HP, Lenovo or other major-brand desktop, or $149 for a custom-built or boutique PC, credited toward the repair when you approve it. If you only want the update done on a working PC, I quote it at drop-off. Rush service is available for an extra $100.
BIOS Update Gone Wrong? Bring the Tower to Somerville, New Jersey
Bring the tower, the power cord and the USB drive you used; leave the monitor at home. I'll work through the recovery options under the $75 diagnostic ($149 for custom-built and boutique PCs), credit it toward the repair when you approve the quote, and tell you straight whether the board can be saved. Not sure it's the BIOS at all? Start with my custom PC diagnostic.
📞 (908) 428-9558