Delete an unused profile when you delete an account
If you delete an account with a tool other than User Accounts, the account's profile continues to occupy space in the Users folder and in the registry. You don't want to delete the files or registry entries directly because a simple mistake could affect other accounts . Instead, in Control Panel open System and click Advanced System Settings . Click the Advanced tab and then click Settings under User Profiles. Select the account named Account Unknown (the deleted account), and click Delete.
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