Another one: Polyglot 3000 ;D

I have been using inbox.com email for a long time and it have been great. It has a clean interface with 5GB (for US, CA and UK) or 2GB (for other locations) storage. Although I experienced some downtimes (sometimes lasted for a few days) due to hardware failure or other problems, their support reply quickly to your questions. Best of all, there is no advertisement and you can find a lot of nice features such as notes, calendar and storing your files and photographs. I disabled the spam filter as it works poorly - spam mails get into the inbox, non spam mails get recognized as spam ;D. It offers pop3 access, I only used it once and it could only download the emails but couldn't delete them - maybe I didn't set it right. It seem to be able to block most of the viruses as I have yet to receive one.

I am not sure if they are from the same company, there is another identical service at crawler.com. There is one thing that you need to be aware, if you send an email to a hotmail address, it may end up in their junk mail box. It will not be a problem if you are on their whitelist though. Overall, I feel that it is better than other email services and you have a easy to remember @inbox.com address.

For automatic lock, you can use the password protect feature in Display Properties > Screen Saver