Bios back flash lenovo enabled or disabled reddit I rolled back my bios, just enable bios flashback or whatever and then download and install the previous bios version. I hope someone here can help me get back into windows or at least secure my data. 0 controller functions are handled at the BIOS level, instead of OS. 7ghz. Then, the installation screen appeared again, and it booted up normally. Let's see how this one treats me. After you booted to windows go to the following link and download the previous BIOS version: jycn47ww. Then It flashes ok, but to the same version already present (j2cn37ww). The BIOS does not have the option to enable VT-d, does this mean that I cannot use it in… https://forums. I tried turning secure boot off - no help. However, the update failed and now the device won't turn on at all. I would see if the tool has a force option. The option to enable and disable is there in security, but updating it doesn't change anything. Btw, I need to enable secure boot cause of games like valorant's anti cheat vanguard. Insert Recovery Media and Hit any key Then Select •Boot Manager to choose a new Boot Device or to Boot Recovery Media” I hit FN+f2, bring up the BIOS and it says that the hard disk is not detected. BIOS Self-Healing=Enabled my device is Lenovo ideapad s540-15IWL GTX after recent bios update for version BWCN19WW the internal HDD (ST1000LM035-1RK172) , started to fail and this took me months to figure the problem but after searching for alot of time i found that this exact HDD model even in different laptop brands like Asus or Dell with bios updates is failing and i mean by failing that you suddenly find your TL;DR for a home user, disable it. Found another post about issues after upgrading from 57 to 58, so assume that 57 is good, unfortunately it doesn't look like you can download it from Lenovo (dead link). When asking a question or stating a problem, please add as much detail as possible. Jetzt habe ich gesehen in BIOS, dass BIOS back Flash deaktiviert ist. If i enable, i cant undervolt in XTU. The way it works is that - when enabled - the OS respects the installation requirement in the UEFI BIOS for the software. For PC questions/assistance. I currently have Bios version GKCN55WW installed would like to rollback to GKCN49WW. Skill RAM on Advanced BIOS with XMP View community ranking In the Top 1% of largest communities on Reddit. The TPM keys are still there, but updating bios disables the TPM. hence in txt file it tells you "(Note) If the UEFI BIOS has been updated to version 1. Boot into Windows. Windows is still showing me that I have 2GB of Second bios version: GKCN53WW (battery issue + fan problem) Final bios version: GKCN24WW (so far no problem) My bios version was GKCN46WW I was having the battery issue with this bios version, then I think maybe if I update my bios to latest version I can fix the problem. Should it be "Disabled" -> both options don't fix the error above. I really need some assistance like ELI5 here. I'll update it here. Legacy USB Support - There are 3 options available: Enabled / Disabled / Auto Enabled (Default) - Explicitly Someone who can modify the bios to disable the computrace (and usually can remove bios password as well), one of the service link had been posted here, site like allservice. I understand that I need to disable secure boot in the BIOS before the system will boot from the USB drive. Then, went into BIOS and have disabled hybrid mode. Off by default and prevents you from installing a bios version older than the current one installed. 2025. Ensure the setting on “Allow Flashing BIOS to a Previous Version” is set to “Yes”. It's all about the ability to rewrite (blocks and bytes) and update the firmware. 34. So I entered BIOS and into Boot to enable Secure Boot. Here you can find BIOS Back Flash which you have to enable from disabled(by default) - see picture; Press F10 to save changes and boot to Windows. " XHCI Hand-off - There are 2 options available: Enabled / Disabled Enabled (Default) - USB 3. Switched to 3GB, exited and saved. I updated my bios to GKCN53WW version (which Lenovo Vantage app offers). com) Typically, you hold the appropriate key down during boot to get into BIOS. Install the recently released non-beta bios. Press "Exit" on the left Menu Press "Exit Saving Changes" from the options on the right Enable Bios Back Flash. If you have a specific Keyboard/Mouse/AnyPart that is doing something strange, include the model number i. Вероятно, далеко не каждый слышал о параметре Bios Back Flash в UEFI/BIOS. Now when I try to get back into the BIOS to change some settings, the system automatically gets into installing the latest BIOS again. Changed from 6-Thanks to StatisticianOk2205. I tried this but it didn't work. One of the pages (Security) will have the option to enable Secure Boot. BIOS Back Flash. This subreddit is community driven and not directly affiliated with Lenovo. This article shows you how to fix BIOS rollback flash failure (Secure Flash Authentication Failed) when “Secure Rollback Prevention” enabled - ThinkPad I'm having problems with the BIOS on my Lenovo y530 someone told me to try to backlash the bios but I have no idea how to do it and I can't find any… Navigate to the Boot tab and make sure the USB drive shows up under the EFI boot devices. Secure Boot is now only "Enabled" and "Disabled". If you've got another PC, try recreating the bootable USB with the Windows 11 image. I was given a previous version (V1. Do you have any hint for me? thanks! Solved: Bios Update did save the update info/file in an EFI partition I guess. EDIT: if you are having issues with new bios then I suggest you to do a bios back flash here's how : Enter the BIOS, press F2 repeatedly. I've made a couple of copies of the chip's contents and flashed it with a new one downloaded from the official page. I have an "Undervolt Protection" setting in Bios (Asrock Z790 PG Lightning) that can be disabled. edit, BIOS versions I brought a new Ideapad gaming 3 3 months ago and while I was messing around I setup up a bios system password (don't ask me what I was doing there) but today I got a bios update from Lenovo Vantage and it disabled secure boot. Please read carefully and go through all the steps and when TPM erase Enter the BIOS and enable the BIOS flash back option, save & exit. Lenovo has been notorious of not allowing users to access advance bios settings, but recently I have found a way to access this options in the bios menu. I can enter the BIOS (it asks for a password, but just hitting enter goes through, which indicates the BIOS isn't locked, right?) but once I'm in, although I can navigate to all tabs and sub-items, it doesn't let me select any value to actually change it. specific BIOS vers with security updates disable rollback. 01 bios file, so I’d say go ahead and go for it! 3- then headed to install bios version BWCN15WW ( make sure bios back flash enabled in bios settings) i did extend tests, SMART , linear read , etc via tools like Seatools (from Seagate official website ) and Lenovo diagnostics ( found in the drivers for the device in the support site) and it passed no fails Where can I disable fTPM? I already searched for this in the BIOS but didn't find it. Its an Asus TUF z690 with intel i5 12600k. Upon entering the bios, VRAM was on 4GB still which I had it set to. Now boot back into Bios and you should see Advanced option on the left. It should be the folder containing the BIOS firmware of the W-version. Feb 17, 2025 · Want to ensure a safe and smooth BIOS update on your Lenovo LOQ 15IRH8? Concerned about potential issues during a BIOS flash? Here's how to enable BIOS Back Welcome to /r/Lenovo, A place where Lenovo owners and prospective buyers can engage in discussion, solicit advice and post pictures. After looking a bit more online, I decided to try and do a bios back flash (reverting to an older version of bios) so that I could then update it again and maybe, hopefully, that would make my system detect the ram again. 11) by a support agent but when I installed it, it detected that it's the previous version and canceled the installation. (Getting into the BIOS gives me a password prompt and entering without a password greys out all the settings. TLDR; I updated BIOS(because I'm a noob) and local apps take 15 seconds to open, called support twice, factory reset once, helped for 6 days, now back to slow and need to know if I should flash back to BIOS 49? or if I should do something else. Just go inside Security, then UEFI BIOS Update Options and uncheck Secure RollBack Protection. By now I was going crazy. I forgot to mention: When I was updating the BIOS, the screen went dark for a few minutes, so I had to press the power button to reboot the system. Reset bios to defaults, still no dice, but secure boot turned back on and would not toggle to off. Was able boot off usb and "These settings are sometimes contained in a sub-menu in the UEFI BIOS labeled Advanced, Security, or Trusted Computing. EDIT3: Bios has been updated Make sure that "BIOS rollback" option is enabled in BIOS Menu, before downgrading it. g. But that does not mean that it will allow downgrading which may be what you are running into. You boot into BIOS using the appropriate "BIOS Key" for your make/model: List of PC brands with their corresponding hot-keys (disk-image. BIOS Back Flash=Enabled. requesting a bitlocker key. If Secure Boot still doesn't get enabled, go back to the BIOS and select the Restore Factory Keys option below where you enabled Secure Boot. Things like UUID, SN, and MAC got lost in the bios but don't seem to be an issue so far. As it turns out, I got separate advice to uninstall the Microsoft-ACPI Compliant Battery driver, and restart to reinstall that driver. Read the prompt when you enable it. Press the F1 key to enter the Lenovo BIOS Setup Utility and select “Security”. Clicked the link provided here and downloaded the . That's re-assuring to hear. Go to your bios settings and try to find the allow "bios back flash" setting, should be there but disabled by default, try to enable it and if successful download the older bios version you had and reinstall it, that's pretty much the only thing you can do besides waiting for another bios update update to fix this problem. e. Enable all Intel Virtualization including Intel VT-x or Intel VT-D, reboot back into BIOS Enable PTT under Advance/ PCH-FW Configuration (PCE Firmware). SKILL RAM at Stock CL22 Settings on Basic BIOS - SLOW G. I think it's because the BIOS update clears the TPM key on the systemboard/CPU where the encryption key was stored, and then that requires the recovery key. "Enabled" but with the disabling options available is how the laptops come stock, my T500 is like that. If you do normally use UEFI boot, there has been at least one case where the EC does not get flashed until the BIOS is switched back into UEFI mode - after which the EC was automatically flashed on the next reboot. Whats the next step after enabling the bios back flash in the bios? Do I click and set up the gkcn40ww file on windows or I have to use usb to flash in the bios ? I'm really confused rn idk the step by step of this process edit: Nvm, Ive successfully downgraded. Are there any other Disable CMS and reboot back into BIOS Enable Secure Boot and choose Windows UEFI as the secure boot drive and reboot back into BIOS. exe file. Go to Exit and exit saving changes. If you're still hitting a wall, the USB drive could be corrupt or the download of Windows 11 might've gone wrong. I just wanna use that dTPM chip and no fTPM. Second boot the screen stayed black for about a minute then rebooted so don't panic if you do the Jul 3, 2005 · BIOSの設定でEnabledとDisabledのどちらが有効、無効か忘れてしまいました。知ってる方教えてくださ BIOSの設定でEnabledとDisabledのどちらが有効、無効か忘れてしまいました。知ってる方教えてください。 「Enabled」が有効で、「Disabled」が無効です・・・・・・・。 Boot into Bios with F2, click on advanced Bios to access the main Bios screen Hold down Fn key and press R for 2 seconds, release Fn and R. vfovnz ctpk teukich uimgh ptu ycgbn vfdctv civkukj csgan wkhlbsz swiiae fxqxcvy uhdmjc zkyvkfp imtp