question: change your password regularly eg. every 90 days.
Capitalize this past sentence correctly.
A: Change your password regularly eg. every 90 days.

question: live video streams will be available during the debconf talks and discussion meetings, and recordings will be posted soon after the events.
Capitalize this past sentence correctly.
A: Live video streams will be available during the DebConf talks and discussion meetings, and recordings will be posted soon after the events.

question: the arburg stand a13 in hall 13 at the k 2013 was a real magnet for trade visitors and customers from around the world. no wonder, because outstanding world premieres and innovative applications were presented, as well as something that will change the world: our revolutionary additive manufacturing invention – the unique freeformer and arburg plastic freeforming (akf) – were at the centre of our trade fair exhibits.
Capitalize this past sentence correctly.
A: The ARBURG Stand A13 in Hall 13 at the K 2013 was a real magnet for trade visitors and customers from around the world. No wonder, because outstanding world premieres and innovative applications were presented, as well as something that will change the world: our revolutionary additive manufacturing invention – the unique freeformer and ARBURG Plastic Freeforming (AKF) – were at the centre of our trade fair exhibits.