Razer Synapse

Subject: Critical Installation Failure (Exit Code: 4294967295) and Device Detection Issue - Razer Viper V3 ProTo the Razer Support Team,I am writing to report a persistent technical issue regarding the installation of Razer Synapse (both v3 and v4) and a device detection problem with my Razer Viper V3 Pro.The Problem:Despite being a developer-level user and trying multiple advanced troubleshooting steps, I am unable to install Razer Synapse 4 via the standard installer or Windows Package Manager (Winget). I consistently receive the following error:Error: "Installer failed with exit code: 4294967295" (Equivalent to Exit Code -1).What I Have Already Attempted:Environment Variable Redirection: I redirected both User and System TEMP/TMP variables to C:\Temp to bypass any path or permission issues.Clean Reinstallation: I have completely purged all Razer folders from %AppData%, %ProgramData%, and wiped Razer keys from the Registr

The latest Synapse update (I had one yesterday I think) disabled the automatic profile switch for some applications. The profiles do not switch automatically for Google Chrome or VSCode, but they do work for others like Visual Studio or some games.I tried everything that was suggested in some support threads regarding the faulty profiles switch (there are lots of them apparently, meaning Synapse is quite buggy).Razer, please debug the latest release or give me a link to an older version of Synapse 4.

Now can switch ANC on/off or ambient, but cannot adjust ANC level in Synapse 4 version 4.0.86.2601160905 and beta version 4.0.86.2511170410.Synapse 3 and Audio app are correctly. Since 02-Nov-2024, I reported this issue to Razer Support staff.By the way, last month (10-Dec-2025) Razer Support staff replied me that they tried to fixed.What are Razer doing?

This functionality was promised to be ready with Synapse 4’s public release, so why it is still not available?

I have a mac notebook os Monterey 12.7.6 Intel Quad core i7 .Cannot get drivers to load did I PURCHASE THE WRONG MOUSE? I have some functions (wheel and L and R) buttons .I keep getting my ___ kicked in all games played.Please any advise would be Great or just buy a another mouse?Thank You For Your Time on reading this problem.

This used to work fine, but for the past few weeks (probably following an update), Synapse now opens to the desktop after Windows starts.I’ve checked the setting in Synapse, and turned it off and back on.I’ve also checked the Run registry setting which appears to be correct."C:\Program Files\Razer\RazerAppEngine\RazerAppEngine.exe" --url-params=apps=synapse,chroma-app --launch-force-hidden=synapse,chroma-app --autoStart=1Generally, Synapse 4 has been more stable this year and having release notes at long last is a welcome improvement. Just a shame I now have this new bug.

Beta name was removed, but beta quality was not. Give it more months to cook.

For many years in synapse 3 I had Excel linked to special profile. After migrating to synapse 4 few months ago I was unable to do so, so had to roll back to S3. Now, few weeks ago I tried S4 again and it worked this time. But today it stopped working. In the linked games tab excel was shown with comment "game not found". I deleted it from the list and tried to re-add it. For some reason when I choose Excel.exe with "brose" menu nothing happens, and it returns to the menu of linked games.That is very frustrating for me, since Excel profile is the most important function in synapse for me.

Hello,I recently purchased a Razer Wolverine V3 Pro, and I am currently unable to use it properly due to a critical issue with Razer Synapse.The controller is detected, but Synapse is stuck on "Loading" / "Syncing Profiles", and no changes are applied to the device at all. This makes core features like remapping, RGB, and stick calibration completely unusable.Key Issues:No settings are saved or applied to the controller RGB lighting does not change Button remapping does not work Stick calibration and deadzone adjustments do nothing Synapse remains stuck syncing indefinitelyMajor Concern:The required Synapse services are missing entirely from the system:Razer Synapse Service (missing) Razer Central Service (missing)Only the following services exist:Razer Elevation Service Razer Game Manager Service 3

Does anyone elses keys mapped to volume not change the volume more than one step when you hold it down? This only happened recently, which im assuming is from the update and it doesnt occur when using a saved profile when synapse is closed

g, h, j, k, o, p, [, ], c, TAB, LShift, CapsLock, Del, PGup, Numpad4, Numpad5. All have the blue LED disabled. The first day i noticed i was able to get it to temporarily fix itself by unplugging the keyboard , restarting synapse 4, and plugging it back in. but since then this issue persists, i know these LEDs are not burned out. they are just software disabled. I've tried firmware updating and factory resetting the Hunstman Elite. But i wish not to uninstall synapse if i can avoid it. When synapse is off and the keyboard is on default spectrum cycling the blue LEDs remain disabled.I am firmly certain this is a synapse issue but because my keyboard is out of warranty i was forced onto this forum instead of talking to a customer service person. Edit* Windows Dynamic Lighting is off, Razer is set to Chroma RGB.

I buy a viper mini this month.but it can’t connect to synapse4. how should i do guys

Ok, so this is probably a dumb question but how do I associate a Chromo Studio profile with a keyboard profile on my Blackwidow v4 Pro Keyboard in Synapse v4? I used to be able to do it really easily in Synapse v2 (I skipped v3). To be clear when I change to keyboard profile 1 I want to display  only the QWERTY keys in green and everything else in blue. When I change to profile 2 I want it to display only the QWERTY keys in blue and everything else in green. Simple (and not real) example but I can’t make it work. I don’t want the change to be linked to a specific game, the only thing changing is the keyboard profile. I can make it work if I select quick effects in the lighting tab but when I select Advanced Effects it doesn’t save different choices under the Chroma Studio dropdown. I’m sure I am missing something obvious but for the life of me I can’t see what. Thanks in advance for any help you can give

When I have the headset plugged directly into my pc I’m able to change setting in synapse but when I switch over to hyperspeed wireless(no longer plugged directly into pc, but plugged in through the oled control panel)I’m no longer able to customize synapse or the oled screen. The only time I’m able to change options is when(plugged directly into my pc by usb) when I try to change anything with the oled panel it says the device need to be unplugged and turned into hyperspeed wireless. But when I unplug the headset from my pc I’m no longer able to customize through synapse because it says the ”device is switched off” which my headset is powered on and is connected to my pc(I still have audio) so I know it’s powered on. I’ve tried restarting my pc, reinstalling Razer synapse 4, reinstalling drivers. Nothing has seemed to work.

I have been using Razer Synapse 4 for a long time, but as of today, April 3rd, my razerappengine is using 18% CPU and 10g RAM and climbing if I don’t crash it with Task Manager. Also when I’m using the APP interface, the icons of my products are shaking and blinking like they’re spazzing out.

Hello, I’m currently using my Viper Ultimate for 3-4 years for now. Even before, I was using my side button for Alt+tab function. Previously with Synapse 3, If I hold down the button, the “alt” stay held and only “tab” is pressed (Turbo enabled) -Just like when you press alt+tab, release tab and hold on alt, I can choose which app to move to with how many click I want. I got updated to Synapse 4, the “alt” is now also pressed with “tab”, now I can only choose to tab out between 2 app and now I have to alt-tab manually on my keyboard, It is very anoying to me. Can’t even rollback to Synapse 3 because Razer decided not to let us do that. Does anyone have a solution for this,  and yes I do aware ctrl-alt-tab is a thing, but It is 1 additional click instead of holding down the side button, It’s a big inconvenience for my high-speed usage, plus. I don’t want to change my habit. Razer please, Is this really an upgrade???

"Hi ,My DeathAdder V4 Pro firmware update is stuck at 50%. I've tried:- Plugging into different USB ports- Re-downloading firmware from your website- Uninstalling and reinstalling Razer Synapse- Updating in Safe Mode- Using a different cableIssue persists. Could you please help troubleshoot further?

v2 hyperspeed I'm using it, but the EQ settings aren't working

Hello everyone, first time razer customer here. I picked up a Tatarus V2 after seeing some people online talk about how great it works for video editing (my profession).  I got really excited about it, but was sad to see that it isn’t supported in the synapse for max preview yet. My question is: is it planned to ever be supported on synapse for Mac? Will products as old as the Tartarus be included in this new software? Or should I just return the Tartarus to Best Buy Thanks 

The cooling pad does not work after the firmware update. Only the red light blinks, it doesn't check the temperature, and it doesn't work at all. I deleted and reinstalled Synapse 4 and even formatted the PC. What on earth was this update for? Please take quick action.

Hello! I connected my headphones wirelessly, and they're working. I can hear music and chat with friends. But the app keeps showing them as off, so I can't see the battery level or set them up. Could you tell me what the problem might be and how to fix it? Thanks in advance.

I’ve upgraded from Synapse 3 to Synapse 4 on Windows 11 and cannot control the lighting of my Raptor 27 (165Hz) monitor via USB-C connection. Previously in Synapse 3 this was working.  

Just bought a new Barracuda Pro headset and a Viper V3 HyperSpeed mouse. Whenever I launch installer for Synapse, I get Server Access Unavailable. Went through all of the troubleshooting steps found online with no luck. Tried to updated BIOS, turn VPN on/off, turn Firewall & Windows defender ON / OFF,  add exceptions etc to firewall, change IPV4/IPV6 settings,  launching installer through earlier versions, trying to install other razer apps first (can’t install anything, same error every time), made sure network drivers and windows is updated, tried wired connection, tried mobile hotspot, WIFI, removed all razer devices and their drivers. Probably forgot to mention a few more since I’ve been at it for hours.Literally nothing seems to make a difference and at this point I’m losing hope which is a shame since there’s so much of the headset features locked behind Synapse and I just bought them today. Any help would be greatly appreciated!

Every time I boot my Blade, Razer Synapse 4 started slow and showed blank at first. After about 10sec, it shows downloading Blade 18. It takes about 2min to load drivers for Blade. I hope to launch Synapse more faster, and not to download & install after I boot my Blade. Could it just install new driver when it updated？ 

As it says on the tin (using Windows 11).I mainly use a 65% keyboard which doesn’t have F1-F12 keys, so I have to use Fn + 5 for F5, Fn + 9 for F9 and so on. Got a DeathAdder V2 X Hyperspeed. Wanted to bind Mouse Button 4 to the Fn key to make the F1-F12 inputs more seamless. Problem is, Razer Synapse refuses to acknowledge the Fn key: it’s not in the “Keyboard Function” binding tab and doesn’t even register when you try to record the input. Problem is not the keyboard mind you - tried it with both my Akko and HyperX and the Fn keys are working perfectly. To be clear: Fn keys work under any use case, Synapse just doesn’t recognize them.Any thoughts as to what could be going on? Pretty bizarre that the literal Function key is not available as a function in Synapse.Cheers!