Microsoft said the root cause has been fixed, ChainCatcher reported. The Windows 365 cloud PCs had issues due to a recent update to the CrowdStrike Falcon sensor software. Although the root cause has been fixed, residual effects are still affecting some Microsoft 365 apps and services.

At the same time, a Nasdaq spokesman said that European markets and US pre-market trading are operating normally, and the US market is expected to open normally.