 on Friday. The cyber security firm CrowdStrike, which triggered the problems with a faulty software update, says a fix has been issued but it will take some time to implement. Here's our technology editor, Zoe Kleinman. The recovery period is going to be a lot longer than anything that we have seen before and it's going to affect a lot more people's lives. I think we've all had a bit of a crash course in IT, haven't we, in the last few hours, sort of starting to understand how these systems that we use all the time...