How you go about renaming a user account depends on your login and on whether you’re using a networked computer, writes Patrick Marshall. He also addresses a particularly stubborn pop-up and Windows upgrade problems.

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Q: Are the names of user accounts in Windows 10 case-sensitive? After I create a user account in Windows 10, can I rename it?

I have to create a user account because one of the existing accounts has lost many of the Start functions. I would like to create and test the new account before I delete the old one.

— Ricardo Ardila

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A: First, yes, login names for Windows 10 are case sensitive.

Second, yes, you can rename a user account. But the exact steps depend on whether you’ve used your Microsoft account login as your Windows login or you’ve created a local user account. It also depends on whether this is a local computer that’s on a workgroup or it’s a networked computer that’s a member of a domain.

The first option is the recommended option for home users. Here are the steps for that. Click on the Start button and select Settings. Next, choose Accounts and then “Your email and accounts.” At the top of the screen you’ll see a link for “Manage my Microsoft account.” Click on that and, assuming you have an Internet connection, a browser page will open. At the top of that page, right under your name you’ll see a link “Edit name.” Click on that and you can rename your account.

If your user profile is corrupt, you can simply create a new profile. But if you’re using a Microsoft account for your profile, that may not be an effective method. Here’s a link that offers the steps for fixing a corrupt profile:

Q: How can I get rid of the pop-up asking me, “Are you sure you want to leave this page?” It appears often, and typically when I try to leave my Gmail page.

I have tried to disable add-ons and remove JavaScript, but it still comes up. I am using Internet Explorer 10, and the browsers I have tried using are IE and Google Chrome.

— Jerry Vaughn

A: That’s just Gmail giving you a chance to remember that you left an email with lots of things in it you’re not going to want to retype.

I’m afraid the only way to get rid of that pop-up — whether on Gmail or any other website — is to refrain from visiting the sites where you encounter it. That message — and the extra click required to respond to it — is scripted into those websites.

Q:My system had been running Windows 7 Home Premium and doing fine. When I received notice of the availability of Windows 10 and ran the tests that checked to see if 10 would be OK on my system, I upgraded.

The first issue I noticed was that my Norton Password Vault essentially disappeared — 120 logins and passwords gone!

Then I updated a spreadsheet that I used all the time and was unable to save it. That apparently was caused by the fact that my administration permissions on all my files had been revoked. (I’m the only user of this machine).

Internet Explorer stopped working and other annoying issues kept popping up. I finally resorted to going back to Windows 7 and changing my browser from IE to Chrome.

I would like to try Windows 10 again because in the short time I used it, I liked what I saw. But I’m not prepared to put the time into upgrading and having to move back to Windows 7 a second time. Any suggestions?

— Ralph Davis

A: It’s not unexpected that some third-party applications might not work properly after upgrading. And I have, in fact, seen that many users of Norton Password Vault have had difficulties.

In general, before upgrading, it’s a good idea to make sure all of your applications have been updated. It’s possible that an update has been provided to make the program compatible with the new operating system.

If you’ve already done the upgrade, however, you may need to reinstall some compatible applications.

Also, it’s really a good idea to back up all of your data before upgrading.