We have received reports that in particular circumstances the latest versions of ProtonVPN Windows clients (the stable version 1.18.2, and the early access version 1.18.3) might lead to Blue Screen crashes in Windows, due to a conflict with certain antiviruses.
We are actively working on a fix that will be made available as soon as possible.
If you are affected by this situation we advise to either temporary disable the antivirus that might enter into conflict while using ProtonVPN, or to downgrade to the previous stable version.