Latest update to Synapse completely broke it

Update: I just finished completely uninstalling and reinstalling Synapse. Even removing any traces of Razer under programs files and deleting any existing drivers left over. It still isn’t opening. I can’t see it under my taskbar and start menu even though it’s still running under task manager. It has to be either something wrong with the latest Synapse update or a Windows update somehow broke Synapse. I updated Windows at the same time as Synapse on Friday 9/15 when the new update released. Seriously nobody else is having this issue?? I can’t be the only one, seeing as I have spent the last 2 days troubleshooting this and removing everything Razer related on my PC.

Yap, I have the same problem and it happened in the same way.

I solved it. Use Revo Uninstaller Pro and do a forced uninstall.

I’ve been having issues with Synapse 3 since around the same time as you. It seemed to go sideways for me around the time of the Windows 11 23H2 update. But it could have also been the update to synapse, or maybe Cortex. It all happened around the same time for me.

At first, Synapse wasn’t starting when launching Windows. Then recently it stopped detecting my laptop (Blade 16). At this time, I followed the steps laid out in this Reddit thread: https://www.reddit.com/r/razer/comments/4hyqog/synapse_not_detecting_anything/

Below is the comment (not mine) that helped:

I have just fixed my issue thanks to Razer support, here's the instructions I was given. Hopefully it helps you!

What you described sound like a common driver conflict issue, as the system uses a different driver, causing Synapse to not recognise it.

Please kindly uninstall both Razer Synapse and Razer Core from your PC and delete all files in C:\Program Files (x86)\Razer and C:\ProgramData\Razer directories. These folders are hidden by default, so please be sure to unhide them. We want to ensure that there are no residual files remaining that may corrupt your installation. This is important so please kindly do so. Restart your computer afterwards.

Go into device manager, go to Keyboards/Audio inputs and outputs/Mouse and other pointing devices, uninstall HID Keyboard/Mouse Drivers and all other Razer product drivers, and restart your PC. Be sure to select delete drivers as well when uninstalling. Restart your computer again.

Turn off all Firewall and Anti-virus software to prevent any conflicts. Then, install the latest version of Razer Synapse

Please do not reuse a previously downloaded version of the Synapse installer. Please kindly redownload and reinstall Synapse.

The main key for me, which I had not fully tried before, was to uninstall ALL HID Keyboard and Mouse drivers in Device Manager, not just the Razer device.

When I restarted my PC, it popped up with a prompt to install the Razer software - I think this is another red herring!!! This popped up for me when I was setting up Windows originally, but this time I ignored it and made sure to install the latest Synapse software instead.

This seems to have partially resolved the issue, in that Synapse 3 is now detecting my laptop (for now). It’s still not loading at startup though, so that will require more troubleshooting. If I figure anything out, I will report back.

Wanted to share because this issue seems somewhat common, but there is a shortage of working fixes that I have been able to find thus far.