Windows does a mediocre job of saving passwords. Sure, passwords are saved, but there always seem to be problems when the password changes. This is only one problem, tho. What I'd really like to see is the ability to group resources together to use one set of credentials. Enterprises have been providing single sign-on capabilities for quite a while. Those who haven't, are trying to move to this type of simplicity. With that, you typically have one credential store (i.e. Active Directory (AD)) and all enterprise resources use those credentials. What I'd like to see is, when you're asked for your credentials, you should have the option to use an existing set. I'm not sure if I'm explaining this very well, so let me give you an example...
I work for Contoso. I login to my corporate laptop using my contoso\flanakin credentials provided by AD. That's great. When I'm mobile, I may log into Outlook Web Access (OWA), which uses the same credentials. Alternatively, I may open Outlook, which, of course, uses the same credentials. Now, say I need to VPN into the network from a personal computer. Nowadays, I'll use a smart card to VPN in; however, once I get in, I'll have to re-authenticate with every individual resource. A few examples might be the SharePoint sites I use for the project I'm working on, internal collaboration sites, and my internal weblog. Honestly, I could give a hundred different types of internal resources, but you get the idea.
Currently, Windows needs 3 things to save your credentials: username, password, and the resource you're accessing. I want to change this in two fundamental ways. First, let me name the credential set. This way, I can specify contoso\flanakin as my Contoso Corporate Account. This may not be a huge deal, but it'd be nice to have a simple name. Second, allow me to add a group of resources to the access list for this credential set. This is obviously the key to what I'm really looking for. The value of this lies in the simple fact that, when I have to manage my credentials, I can change one and all of them will be able to acknowledge and use that change. This would be invaluable to me and anyone who uses a lot of access-controlled resources.