If you ever lost your Windows password, you can recover it by running a Linux utility called chntpw. You’ll need to boot into some kind of Linux Live CD to be able to run the chntpw utility. There are a number of Live CDs out there, that you can download online, to run Linux on your system, without installing it on your hard drive. The tried and true Knoppix is one option. Ubuntu and Fedora have their own versions. For the full instructions on how to recover your Windows password, check this article from opensource.com.
Apache Kafka is a message broker service similar to ActiveMQ and RabbitMQ. Message broker services allow you to read and write streams of data. It’s a highly scalable system which can be distributed, replicated safely in a highly tolerant cluster. Here’s the article to help you install Kafka on the Ubuntu server.