Which banks were affected by the Microsoft outage? What we know.

Windows computers are seeing the Blue Screen of Death, flights are being grounded, and websites are down, all because of an update gone wrong from CrowdStrike.

"CrowdStrike is aware of reports of crashes on Windows hosts related to the Falcon Sensor," CrowdStrike wrote in an alert at 1:30 a.m. ET on Friday. "Symptoms include experiencing a bugcheck\blue screen error related to the Falcon Sensor. Our Engineering teams are actively working to resolve this issue and there is no need to open a support ticket."

The CrowdStrike crash didn't just affect personal computers, though — it affected everyone who uses the cybersecurity company or Windows, a wildly popular operating system that supports loads of devices and companies.

"We're aware of an issue affecting Windows devices due to an update from a third-party software platform. We anticipate a resolution is forthcoming," a Microsoft spokesperson said.

Among the companies affected are banks, so if yours isn't acting right, don't freak out. Here's a list of banks and financial apps that might be affected by the outage, according to DownDetector.

• TD Bank

• Charles Schwab

• VISA

• Bank of America

• Chase

• Capital One

• Arvest Bank

• Wells Fargo

• Square

• US Bank

• SNAP EBT

• E-Trade

This is likely not a complete list of the banks suffering the effects of the Microsoft outage, but does show the problem has had a widespread impact on financial institutions.

This is a developing story...