To link your local user profile on a Windows 8.1 computer to a Microsoft account, you can follow these general steps: 1. Sign in with a Microsoft Account: - Ensure you are signed in to your Windows 8.1 computer with your Microsoft account. - If not, go to "Settings" > "Accounts" > "Your account" and select "Sign in with a Microsoft account instead." 2. Switch the Local Account to a Microsoft Account: - Go to "Settings" > "Accounts" > "Your account." - Under your local account name, you should see an option like "Sign in with a Microsoft account instead." - Follow the on-screen instructions to link your local account to your Microsoft account. 3. Change User Name: - You can't directly change the username of a local account after linking it to a Microsoft account. Each Microsoft account has its own username. - You will have to create a new local user account with the desired username and link that to your Microsoft account. 4. Sync Settings with Dropbox: - Once your accounts are linked, you can sign in to Dropbox on your Windows 8.1 computer using your Microsoft account credentials to keep your Dropbox settings and files synced across your computers. To summarize, you do not need to delete your existing Microsoft account to link a new local user profile to it. Instead, you can switch the local account to a Microsoft account on your Windows 8.1 computer. However, changing the username directly may not be possible, so you may have to create a new local account with the desired username and link it to your Microsoft account. If you encounter any issues during the process or need further assistance, feel free to ask!