 Seen by the Wall Street Journal that the problem was with the software change it had pushed via Falcon out to clients' computers. The company said its engineers had undone the change, but clients would need to use a workaround to download a fix to affected computers. Some affected users may be back up and running soon, but for others it could take weeks depending on the system in use. The fix CrowdStrike has given is quite manual and may be difficult in some cases to deploy at large scale.