On the forums, a spokesperson said: "We are aware of and actively investigating an issue impacting ability to access Rift software". The error that users were seeing on their headsets stated, "Can't Reach Oculus Runtime Service". It was immediately unclear why all headsets had essentially been bricked but it was soon discovered that Oculus apparently forget to renew its security certificate.
Should your Oculus Rift continue to have issues after this, as some have noted on social media, we'd recommend contacting Oculus Support further about the problem.
Once the Rift suite is back up and running, click the notifications tab in the lower left. For more info and instructions, you can visit here. Most of the operating systems would not allow the software to run without a valid license as there is no appropriate authentication.
Last night, Oculus Rift owners found themselves in a bit of a bind after an error began affecting thousands of users.
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To patch your Oculus software, you'll need to download "OculusPatchMarch2018.exe" at https://www.oculus.com/rift-patch/.
Next, select the fix function and confirm that you would like the patch to fix your Oculus installation. Hit "update" and you're done.
Go to https://www.oculus.com/rift-patch/. Given that the Oculus uses both of these port types (1 x HMDI and 3 x USB - If using the handset), it's perhaps not too hard to see where the issue might occur.
This is clearly a big oversight, but Oculus is not ready to say definitively when the issue will be fixed.