Deleting Old User Profiles in Windows: The Correct Way
Deleting the Folder Is Not Enough — and It Causes Damage
Short answer: to remove an old user profile, do not delete the `C:\Users\name` folder in Explorer. The correct route is Windows key + R, run `sysdm.cpl`, open the Advanced tab, click Settings under User Profiles, select the profile and choose Delete. That removes both the folder and the `ProfileList` entry in the registry together. Delete the folder by hand and the registry entry stays behind; if that user signs in again Windows gives them a temporary profile or throws a corrupt-profile error, and part of the folder cannot be deleted anyway because of locked files. Old profiles are often the single largest item on a disk: a long-used account can hold 20-100 GB of downloads, browser caches, OneDrive copies and application data.
This is one of the highest-yield cleanups on a machine that was handed down at work, that has a forgotten second household account, or that is domain-joined — and also one of the most commonly done wrong.
Key Takeaways
- The correct tool is `sysdm.cpl` > Advanced > User Profiles > Settings; it removes the folder and the registry entry together.
- Deleting `C:\Users\name` in Explorer leaves a `ProfileList` entry in the registry and causes corrupt or temporary profile errors.
- To remove the account itself as well, use Settings > Accounts > Other users; that option offers to delete the data too.
- The `Default`, `Public` and `All Users` profiles belong to the system and must never be deleted.
- Check Documents, Desktop and Downloads before deleting a profile; the deletion cannot be undone.
- If the user is still signed in the profile is locked; sign that account out or restart before deleting.
Comparison of profile removal methods
| Method | Removes folder | Cleans registry | Safe? |
|---|---|---|---|
| Deleting `C:\Users\name` in Explorer | Partly (locked files remain) | No | No — leaves leftovers |
| `sysdm.cpl` > User Profiles > Delete | Yes | Yes | Yes — keeps the account |
| Settings > Accounts > Other users > Remove | Yes | Yes | Yes — deletes the account too |
| Disk Cleanup | No | No | Does not touch profiles |
| Deleting the ProfileList entry by hand | No | Yes | No — insufficient on its own |
Why Do Old Profiles Take So Much Space?
A user profile is much more than the Desktop and Documents folders. The real bulk accumulates under `AppData`: browser caches and profiles, local copies from mail clients, game saves, developer tool caches and every application's own data. A single Chrome profile alone can reach several gigabytes.
The Downloads folder adds to that. Most people never delete the installers they download; on an account used for a couple of years that folder alone can be 10-20 GB. If OneDrive or a similar cloud client was used, local copies of synced files live inside the profile as well.
The result is that finding a 20-100 GB profile on a handed-down work computer, or on a second household account created and forgotten, is not unusual. On most machines this is the largest space reclaimable in one move, and it rarely occurs to anyone — because other users' folders under `C:\Users` cannot be opened with normal permissions and their sizes are invisible.
Why Is Deleting the Folder by Hand Wrong?
Windows tracks a profile in two places at once: the `C:\Users\name` folder on disk, and an entry under `HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList` in the registry. The two are linked, and removing only one creates an inconsistent state.
Delete the folder in Explorer and the registry entry stays where it is. If that account signs in again, Windows sees a profile in the registry but cannot find it on disk; the usual result is a "The User Profile Service failed the sign-in" error, or a temporary profile that resets at every login. On domain-joined machines this turns into a fault that is hard to unwind.
There is a practical obstacle too: part of the profile cannot be deleted. Some files are locked by the system, others require permission changes. You end up with half the folder still there, the space not fully reclaimed, and no idea which files remain.
The Correct Method: System Properties
Windows provides an interface designed for exactly this, but it is well hidden. Press Windows + R, type `sysdm.cpl`, switch to the Advanced tab and click Settings under User Profiles. The window that opens lists every profile on the machine along with its size.
Select the profile you want gone and choose Delete: Windows removes both the folder and the registry entry, and handles locked files properly. This window is also the easiest way to see which profile is using how much space.
Note that this removes the profile, not the account. If the user signs in again, Windows builds them a fresh profile from scratch. If the account should also go, use Settings > Accounts > Other users; the Remove option there deletes the account together with its data.
What to Check Before Deleting
First and most important: this cannot be undone. Deleting a profile removes the Desktop, Documents, Pictures, Downloads and all application data. It does not go to the Recycle Bin. Always review the contents first.
Second, know which profiles to leave alone. `Default`, `Public`, `All Users` and `Default User` are Windows's own profile templates; deleting them breaks the creation of new users. If you see entries ending in `.bak` or named `TEMP`, those are remnants of corrupted profiles and can usually be cleared safely — though investigating the underlying cause first is wiser.
Third, a profile is not the only large item on the disk. The same machine usually also carries tens of gigabytes in `C:\Windows\Installer`, the `WinSxS` component store, system restore shadow copies and the hibernation file. Disk Mop's Disk Analysis module scans all user folders with administrator rights and shows which profile takes what, and the Unused Apps and Uninstall Leftovers modules earn their place in the same cleanup pass.
Frequently Asked Questions
I deleted a profile but no space was freed. Why?
Two possibilities: the deletion may have stalled on locked files, or you deleted the folder in Explorer and part of it survived. Try again through `sysdm.cpl`; if the profile still appears in that list, delete it from there.
What are the entries ending in ".bak" in the User Profiles list?
When Windows detects a corrupted profile it renames the registry entry with a `.bak` suffix and creates a new profile. Those entries point at old, no longer used profiles. They can usually be cleared, but confirm first that the user's data exists elsewhere.
Does the same method work on a domain-joined computer?
Yes. The `sysdm.cpl` window also lists profiles of domain and Entra ID (Azure AD) accounts and deletes them the same way. In managed environments automatic profile cleanup can also be configured through group policy.
Can I delete my own profile?
No, the profile you are currently signed in with cannot be deleted. You would need to sign in with another administrator account and delete it from there. And make sure your data has been moved first.
Verdict
Old user profiles are often the largest single reclaim available on a Windows machine, but deleting them the wrong way both fails to free the full space and leaves a fault in the registry. The rule is simple: remove them through `sysdm.cpl` > User Profiles, not through Explorer.
To see the other large items on the disk in the same pass, Disk Mop's Disk Analysis module sorts the whole drive by size including user folders, and the Uninstall Leftovers module separately lists what removed programs left behind.
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