I am running into the same issue. I followed your steps and like you lost all my profiles but after 10min synapse just crashed again. Have you notice this problem return on your end or am i just special Answer from dschissl on insider.razer.com
🌐
Razer Support
mysupport.razer.com › app › answers › detail › a_id › 5996 › ~ › razer-synapse-installer-failed-to-install-on-windows-11
Razer Synapse installer failed to install on Windows 11
This answer will show you how to resolve Razer Synapse installation issue on Windows 11. ... Below are the steps to resolve the issue. Ensure Windows is up to date. Disconnect all attached Razer devices from the system. Download and install the latest version of Razer Synapse.
🌐
Razer Insider
insider.razer.com › razer-support-45 › synapse-2-and-windows-11-31216
Synapse 2 and Windows 11 | Razer Insider
October 14, 2021 - As windows 11 launched officially i start to use them, but my Kraken 7.1 v2 chroma not work as intended, synapse 2 failed to aply 7.1 audio to any app and even mixer in synapse is not detecting any app and because of this i can't even change ...
🌐
Reddit
reddit.com › r/razer › windows 11, razer synapse 2 (for legacy devices)
r/razer on Reddit: Windows 11, Razer Synapse 2 (for Legacy devices)
October 25, 2021 -

So it seems, Synapse 2 just cannot open in Windows 11. I've tried everything, reinstalling, changing DPI & compatibility settings. I can't get it to open the window and even login. It shows up in the task bar overflow and refuses to open. It's the only app i'm having trouble with so far, in Windows 11

To reiterate: I'm using Razer Synapse 2 for my legacy devices, Razer Anansi Keyboard and Naga 2014 mouse. After upgrading to Windows 11, I can't even get Synapse 2's window to open up and login. I've tried reinstalling and many compatibility modes. Am I shit out of luck?

UPDATE:

was about to reply to some of you with angry comments for spreading misinfo because i contacted Razer and they assured me they're not updating legacy software for Windows 11.

Then i tried it again, and again, and finally, i figured it out. This definitely didn't work on the early versions of Windows 11 but it appears to have changed. I reinstalled Synapse 2 legacy as someone in the comments did, but that wasn't enough. I'm on the latest version of W11.

I tinkered around and changed the High DPI scaling override-
located in the Compatibility Tab of RzSynapse.exe Properties.
Make sure the Override Box is checked,
click the dropdown menu and switch to "Application."
Mine was initially set to System Enhanced.

Yours may have worked without a flaw because it was already set to Application for DPI Override.

This was my initial theory to get it working again when first installing Windows 11 but no change of DPI worked then nor any compatibility setting. Things have finally changed!

Hope this helps anyone else struggling

🌐
Reddit
reddit.com › r/razer › solution for issues reinstalling/installing razer synapse [windows 11]
r/razer on Reddit: Solution for Issues Reinstalling/Installing Razer Synapse [Windows 11]
March 10, 2024 -

TL;DR: If you're unable to reinstall Razer Synapse after an uninstall, try using Chocolatey package manager. It successfully installed Synapse when the standard installer and other methods failed.

Hey r/razer community,

I recently faced a challenging issue where, after uninstalling Razer Synapse, I was unable to reinstall it using the standard installer. The process would start but then abruptly close without any error message or indication of what went wrong. I tried several troubleshooting steps, including cleaning leftover files and registry entries, running the installer as an administrator, and performing a clean boot, but none of these resolved the issue.

Here's what I did to finally get Razer Synapse reinstalled on my Windows machine:

  1. Manual Cleanup: I started by manually removing all Razer-related files and folders from my system, including:

    • C:\ProgramData\Razer

    • C:\Program Files (x86)\Razer

    • C:\Users\[YourUserName]\AppData\Local\Razer

    • C:\Users\[YourUserName]\AppData\Roaming\Razer

  2. Registry Cleanup: After backing up my registry, I removed entries related to Razer from the following paths (please be very careful with registry edits and ensure you have a full backup before making any changes):

    • Computer\HKEY_CURRENT_USER\Software\Razer

    • Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Razer

    • Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

    • Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

  3. Using Chocolatey: When all else failed, I turned to the Chocolatey package manager. Installing Synapse through Chocolatey did the trick when the standard installer didn't work. The command I used was:

    • choco install razer-synapse-3 1.16.0.543 -y

Surprisingly, even though Chocolatey reported that only 1 of 2 packages was installed successfully, Razer Synapse appeared in my list of installed applications. I was then able to open it and update it via Razer Central.

Additional Info:

  • Even if you're installing Synapse for the first time and running into issues, Chocolatey might help.

  • You might want to try installing via Chocolatey right off the bat, skipping the file and Registry deletion steps, as it seems to handle installation issues more gracefully.

Just an FYI for anyone who might be having similar issues - hopefully, it saves you some time and headaches!

Cheers!

🌐
Razer Insider
insider.razer.com › razer-support-45 › why-cant-i-install-razer-synapse-62049
why cant i install razer synapse? | Razer Insider
May 11, 2024 - Verify your firewall or antivirus software settings to ensure they are not blocking the application. Make sure your system specifications meet the minimum requirements here. Run the installer as an administrator by right-clicking on the Synapse ...
🌐
Reddit
reddit.com › r/razer › synapse 2 & windows 11 - any workaround to get it to work again?
r/razer on Reddit: Synapse 2 & Windows 11 - any workaround to get it to work again?
September 9, 2023 -

Hiya,

first off: yes, I did contact Razer Support and it was infuirating and not helpful. They just said Synapse 2.0 & Win11 don't go together - despite the fact it's been working for years. Until a couple of weeks ago.

The issue is, I can open Synapse 2.0 and if I want search for updates, but I can no longer access the settings for my keyboard (Deathstalker). None of the function keys work anymore, no chroma fancyness, nothing. Opening Synapse as admin or compability mode don't work either.

Does anyone have the same problem and found a workaround? If it's broken forever, I'll live with it but I just wanted to check if there's a slither of hope xD

Thanks in advance!

🌐
Razer Support
mysupport.razer.com › app › answers › detail › a_id › 1835 › ~ › razer-synapse-does-not-recognize-or-detect-my-razer-device
Razer Synapse does not recognize or detect my Razer device
Clean reinstall your Razer Synapse 2.0 if the issue persists. Remove old drivers from the Device Manager. Right-click on the Start button. Select “Device Manager”. Click on "View". Select "Show hidden devices". ... Right-click on the unused drivers then select “Uninstall device”. Restart ...
Find elsewhere
🌐
MakeUseOf
makeuseof.com › home › windows › how to fix razer synapse not working in windows 11/10
How to Fix Razer Synapse Not Working in Windows 11/10
October 15, 2023 - Although a .NET Framework version will likely be installed on your Windows 11/10 PC, you might need to update it for Razer Synapse to work.
🌐
Razer Insider
insider.razer.com › razer-support-45 › razer-devices-not-detected-by-razer-synapse-3-on-windows-11-41294
Razer devices not detected by Razer Synapse 3 on Windows 11 | Razer Insider
October 6, 2022 - I later then installed Windows 11 and after 2 months of not using Synapse on W11, I launched Synapse and noticed that none of my devices are detected by Synapse... I already tried the troubleshooting tool but NOTHING. I've senn a post about a folk who had the same problem: /windows-11-not-detecting-mouse.84193/ Has someone found a fix??? Had this issue also with deathadder. Not sure exactly what worked to get it to detect but try disabling the windows firewall and goto device manager remove hardware unplug and plug it back in so it auto detects
🌐
Razer Insider
insider.razer.com › razer-support-45 › razer-synapse-internal-errors-w11-62376
Razer synapse internal errors w11 | Razer Insider
May 18, 2024 - Evening all looking for some pointers in regards to razer software synapse 3.I recently bought a gaming pc back in october 2023 new to pc side of things, running the following specsRyzen 5 7600xgeforce 4060 ti 8gb graphics2x 16gb ram Kingston fury 4800mhz ddr5Samsung pro 990 NVME 2tbgigabyte b650 Au...
🌐
Windows Report
windowsreport.com › windows 11 › how to › razer synapse failed to install
Razer Synapse Failed to Start on Windows 11 [Error Fix]
February 4, 2025 - You might be able to fix Windows 11 Razer Synapse failed to install errors by running the installer as administrator. And that's not all.
🌐
The CPU Guide
thecpuguide.com › home › gaming › razer synapse not opening? razer synapse won’t open?
Razer Synapse Not Opening/Won't Open? Super Fixes [2025]
January 29, 2022 - If you are unable to update your Razer Synapse device drivers by updating Windows, you can try updating through the Device Manager too which in return will fix Razer Synapse not opening.
🌐
The Geek Page
thegeekpage.com › razer-synapse-wont-open-or-fails-to-start-in-windows-11-10
Razer Synapse won't open or fails to start in Windows 11, 10
January 5, 2023 - 2. Next, when you see the “Razer Synapse” in the elevated search results box, right-click that and tap “Run as administrator“. After giving your consent, Razer Synapse will open up. Let it run and scan for all of the Razer devices you have. There are certain services like Razer Synapse service which are needed for the Razer Synapse application to work properly.
🌐
Razer Support
mysupport.razer.com › app › answers › detail › a_id › 1917 › ~ › how-to-fix-razer-synapse-when-it-crashes-or-fails-to-start
How to fix Razer Synapse when it crashes or fails to start
Ensure “RazerAppEngine” is not running at 0%. Open Task Manager. Check RazerAppEngine’s CPU consumption under Processes. If the issue persists, perform a clean reinstall of Razer Synapse. See the answer below for more details. How to re-install Razer Synapse on Windows.
Top answer
1 of 1
1
This is suddenly happening to me as well. I just switched from Synapse 3 to Synapse 4. Chroma and visualizer were working ok and would start on PC boot with Synapse 3. After upgrading to Synapse 4 the visualizer worked for about a day or so, as I was trying to re-set up my environment and familiarize with controls and options. But around day 3 the visualizer is no longer loading. I have tried repairing all of the Razer apps. I have removed and reinstalled Synapse and Chroma and it still isn’t working correctly.Another note is after the PC boots up, when I use the Razer notification icon to pop up the display for the Razer menu where you can change profiles for each device (I’m not talking about the synapse GUI it’s the quick menu from a single click) in this menu it also shows at the bottom the Chroma settings and the Visualizer one has been starting with ‘Always Off’. Now in the first couple days where this happened, in this same menu, I just switched it to ‘Always On’ and I immediately saw the lights change to the correct Visualizer profile (instead of the Quick Effect). This is also no longer working. Now when I switch this setting to ‘Always On’ …nothing happens. Another side note - previously I was clicking in this area to open the Chroma app. Now when I click in this area, 2 different things happen - Sometimes, I can see an app start to open but then immediately disappear - other times I get a Windows dialog that says you don't have an app to open this program, go to windows store to search blah blah.To make things worse, I just got Razer Freyja and Synapse is saying ‘Launch the Chroma app to further customize...” which I cannot get to open. This issue was already happening before I connected the Freyja.Also sorry for lengthy reply but I also have several peripherals and lights setup for the gamer room, and getting quite frustrated with the amount of time and money put into this for it to just stop working without any explanation.
🌐
The Windows Club
thewindowsclub.com › the windows club › fix razer synapse does not recognize or detect my razer device
Fix Razer Synapse does not recognize or detect my Razer device
March 5, 2025 - If the error is not yet fixed, it might be due to a glitch in the Razer Synapse. You need to repair Razer Synapse on your PC and try connecting the device again. ... It opens the Razer Gaming Software window with Modify, Repair, and Uninstall ...