Fixing ‘Access Denied’ errors in the Windows Temp folder: a comprehensive guide

To fix an 'Access Denied' error in the Windows Temp folder, close the app using the file, restart, and reset the folder's permissions with icacls from an elevated Command Prompt.

This guide covers both Temp folders on Windows 11 and Windows 10, six repair methods, the system folder you should leave alone, and ways to clear temporary files without opening Temp at all.

How to fix access denied in the Windows Temp folder

These steps repair the Temp folder that belongs to your own account, which is the one most apps use.

1. Save your work, close open apps, and restart the PC so running programs let go of their temporary files.
2. Select Search, type cmd, right-click Command Prompt, and select Run as administrator.
3. Run icacls "%TEMP%" and copy the output into Notepad, so you have a record of the current permissions.
4. Run icacls "%TEMP%" /reset /t /c /q to replace the permissions on the folder and everything inside it with the default inherited ones.
5. Press Windows logo key + R, type %temp%, and select OK. Then retry the action that failed.

If you approve the elevation prompt with a different administrator's credentials, %TEMP% points to that account's folder. In that case, type the full path instead: C:\Users\<username>\AppData\Local\Temp.

Understanding the Temp folder

Windows has more than one Temp folder, and the right fix depends on which one refused you. You can open the Temp folder in Windows 11 from the Run dialog if you are unsure of the path.

Folder	Typical path	Who uses it	Access to expect
User Temp	%USERPROFILE%\AppData\Local\Temp, opened with %temp%	Programs running under your account	Your account can normally open and write to it
Windows Temp	%windir%\Temp, usually C:\Windows\Temp	The system's temporary path	Windows may ask for administrator approval first
SystemTemp	C:\Windows\SystemTemp	Processes running as SYSTEM	Blocked for everything else by design

Programs store temporary information in these folders and usually delete it before they quit. Microsoft says temporary files that have not been modified within the last week can be deleted safely.

Common reasons for Access Denied errors

Reason	How it shows up	Where to go
A running program has the file open	Some items delete and others refuse	Restart, then method 6
The app is not elevated	An administrator account still runs apps with a standard user token until you approve elevation, so C:\Windows\Temp can refuse changes	Run the tool as administrator
You are not the owner, or your account has no permission	The error remains even in an elevated window	Method 1
Inheritance is turned off	New files or subfolders carry unexpected permissions	Method 2 or method 4
TEMP or TMP points to the wrong place	Installers and apps fail while unpacking files	The TEMP and TMP section below
You opened C:\Windows\SystemTemp	Refused for every normal account	Leave it alone
Group Policy or a management agent restricts writes	Work or school PC, and the fixes do not stick	Contact your IT team
A third-party security tool locked the file	The file refuses only while that tool is active	Check the tool's quarantine or log, then try a clean boot
Windows system files are damaged	Other Windows features fail as well	Method 5

1. Gain complete control of the Temp folder

Take ownership of the one file or subfolder that refuses you, not the whole Temp folder. takeown makes you the owner, and icacls then lets you change the file or folder permissions.

1. Open Command Prompt with Run as administrator.
2. For a single file, run takeown /f "%TEMP%\<item>", replacing <item> with the file name.
3. For a subfolder, run takeown /f "%TEMP%\<item>" /r /d y instead.
4. Run icacls "%TEMP%\<item>" /grant "%USERNAME%":F /t /c to give your account full access.
5. Delete or open the item in File Explorer.
6. For an item in the Windows Temp folder, use %windir%\Temp\<item> as the path and administrators:F as the grant.

Answering y through /d replaces a directory's permissions with full control for you alone when you lacked list and read access. Do not run it on the top-level Temp folders, because other accounts and services need them.

2. Enable folder inheritance

Run icacls "%TEMP%" first. Entries marked (I) come from the parent folder, so a Temp folder with no (I) entries has inheritance turned off.

icacls "%TEMP%" /inheritancelevel:e
icacls "%TEMP%\*" /inheritancelevel:e /t /c

The first line turns inheritance back on for your Temp folder, and the second does the same for its contents. /t includes subfolders, and /c keeps going past files that return an error. For the Windows Temp folder, run only the second line with %windir%\Temp\* as the path.

You should see: (I) entries appear when you run icacls "%TEMP%" again.

3. Enable built-in Administrator account

Use this only when an elevated Command Prompt still fails. Windows setup disables this account, and Microsoft recommends keeping it disabled when possible, so turn it off again as soon as the repair is done.

1. Open Command Prompt with Run as administrator.
2. Run net user administrator * and type a password when prompted. Microsoft notes that a blank password cannot be used for this account.
3. Run net user administrator /active:yes.
4. Sign out, then sign in as Administrator.
5. Repeat method 1 or method 4 with the full path, such as C:\Users\<username>\AppData\Local\Temp, because %TEMP% now points to the Administrator profile.
6. Sign back in to your own account and run net user administrator /active:no from an elevated Command Prompt.

4. Reset folder permissions

The /reset switch replaces permissions with the default ones inherited from the parent folder. That makes the target important, because the parent of C:\Windows\Temp is the Windows folder itself.

Folder	Command	Why this target
User Temp	icacls "%TEMP%" /reset /t /c /q	The folder inherits correctly from your own profile
Windows Temp	icacls "%windir%\Temp\*" /reset /t /c /q	Resets the contents only and keeps the folder's own permissions
SystemTemp	No command	Its permissions are set this way on purpose

/q hides success messages and /c continues past errors, so any error lines on screen name the items that failed. Retry those after a restart, because a program may have had them open.

5. Run DISM and SFC scans

These tools repair Windows system files, not Temp folder permissions. Run them when other Windows features are failing as well. Use an elevated Command Prompt, and run DISM first because it fetches replacement files from Windows Update.

DISM.exe /Online /Cleanup-image /Restorehealth
sfc /scannow

DISM takes several minutes. Keep the window open until sfc /scannow reaches 100%.

You should see: Windows Resource Protection did not find any integrity violations. or Windows Resource Protection found corrupt files and successfully repaired them.

If SFC reports Windows Resource Protection could not perform the requested operation, run sfc /scannow again in Safe Mode.

6. Use a dedicated tool

Microsoft's free Sysinternals tools show what is holding a file or which permissions apply. Skip third-party unlockers and PC cleaners, because these tools reveal the cause without changing anything.

Question	Microsoft tool	How to use it
Which program has this file open?	Process Explorer	Use its search to find the process holding the file, then close that program normally
The same question, from a command line	Handle	From an elevated prompt, run handle <part of the file name>. Do not use its -c switch, because Microsoft warns that closing handles can cause instability
What can my account actually do here?	AccessChk	Run accesschk -d "%USERNAME%" "%TEMP%". R means read access and W means write access
What was refused, and which process tried?	Process Monitor	Capture file activity while the error happens, then filter on the Temp path

Alternatives to accessing the Temp folder

If your goal is free disk space, you do not need to open Temp or change a single permission. Windows has built-in cleaners that delete temporary files for you.

Your situation	Use this	How
You want to clear temporary files once	Cleanup recommendations in Settings	Go to Start > Settings > System > Storage > Cleanup recommendations, review Temporary files, and select Clean up
You want Windows to handle it from now on	Storage Sense	Go to Start > Settings > System > Storage and set Storage Sense to On
You prefer the classic tool	Disk Cleanup	Search for disk cleanup, choose the drive, select OK, tick the file types, and select Delete files
You also want system files removed	Disk Cleanup with system files	In Disk Cleanup, select Clean up system files first, then choose the drive

Storage Sense runs when the device is low on disk space with its default settings, and it cleans only the system drive.

Set Windows Temp folder location with TEMP and TMP variables

Apps ask Windows for the temporary path, and Windows returns TMP first, then TEMP, then USERPROFILE, then the Windows folder. Windows does not test whether the app can write there, so a bad value produces Access Denied errors in otherwise healthy apps.

1. Open Command Prompt without elevation and run echo %TMP%, then echo %TEMP%.
2. If either path is wrong or sits on a removed drive, open Control Panel and select System.
3. Select Advanced System Settings, go to the Advanced tab, and select Environment Variables….
4. Under the user variables, set TEMP and TMP to %USERPROFILE%\AppData\Local\Temp.
5. Select OK, close the dialogs, and restart the app that failed.

Windows system Temp folder access denied

On current Windows versions, apps running as SYSTEM are directed to C:\Windows\SystemTemp. Microsoft states that this folder is inaccessible to non-SYSTEM processes and carries permissions chosen to prevent path redirection issues.

Do not take ownership of C:\Windows\SystemTemp. The refusal is the intended behavior, not a fault. To reclaim the space it uses, run Disk Cleanup or Storage Sense instead of changing its permissions.

How to test Temp folder permissions with icacls

1. Open a normal Command Prompt, without Run as administrator.
2. Run icacls "%TEMP%" and look for your account name followed by (F), which means full access.
3. Run echo test > "%TEMP%\temp-test.txt" to confirm your account can write there.
4. Run del "%TEMP%\temp-test.txt" to confirm it can delete. Neither command should print Access is denied.

How to undo Temp folder permission changes

1. Remove a grant you added to an item with icacls "<path>" /remove:g "%USERNAME%".
2. Return the item to inherited permissions with icacls "<path>" /reset /t /c /q.
3. Compare the result with the output you saved in Notepad earlier.
4. Disable the built-in account if you enabled it, with net user administrator /active:no.

Windows Temp folder not opening or files won't delete

If the same error appears outside Temp, you can fix Access Denied on other Windows folders with a wider set of checks.

Windows Temp folder not opening

C:\Windows\Temp needs an administrator's approval, or its contents have damaged permissions.

1. Sign in with an administrator account and open C:\Windows\Temp in File Explorer.
2. Approve the prompt if Windows shows one.
3. If it still refuses, run the Windows Temp command from method 4 and restart.

Windows temporary files won't delete

A program or service is using the file, even if no window is open.

1. Restart the PC, then delete the files before opening other apps.
2. Find the program holding the file with Process Explorer or Handle, and close it.
3. Go to Settings > System > Recovery > Advanced startup and select Restart now.
4. Select Troubleshoot > Advanced options > Startup Settings > Restart, then press 4 or F4 for Safe Mode.
5. Delete the files, then restart normally.

Access is denied even as administrator

An explicit deny entry, a different owner, or a third-party tool is blocking the item.

1. Run icacls "<path>" and look for your account with (N) or (DENY) beside it.
2. Remove a deny entry with icacls "<path>" /remove:d "%USERNAME%", then repeat method 1.
3. To rule out other software, search for msconfig and open System Configuration.
4. On the Services tab, check Hide all Microsoft services, select Disable all, and select Apply.
5. Restart and test. Then return to Normal Startup on the General tab and select Enable all on the Services tab.

Windows Temp folder keeps filling up

Programs that do not finish normally can leave their temporary files behind.

1. Go to Start > Settings > System > Storage.
2. Set Storage Sense to On.
3. Select Storage Sense and choose how often it runs under Run Storage Sense.

Windows Temp folder access denied FAQ

What is a Windows Temp folder?

A Windows Temp folder is where programs store temporary information while they run. Programs usually delete that information before they quit. Each account has its own folder at %USERPROFILE%\AppData\Local\Temp, and the system uses C:\Windows\Temp.

Where is the Windows Temp folder located?

Your own Temp folder is usually at C:\Users\<username>\AppData\Local\Temp, and typing %temp% in the Run dialog opens it. The system folder is usually at C:\Windows\Temp, which is the Windows folder on the system drive.

Why does the Temp folder say access denied?

The Temp folder usually says access denied because a running program has the file open, your app is not elevated, or the item's owner or permissions changed. Windows also blocks C:\Windows\SystemTemp for every process that does not run as SYSTEM.

Can I delete Windows Temp folder files?

Yes, you can delete files in the Windows Temp folder, and Microsoft says temporary files not modified within the last week are safe to remove. Delete the contents rather than the folder itself, and skip any file Windows reports as in use.

Is the Windows Temp folder safe to delete?

Its contents are safe to clear when they are older than a week, but keep the folder itself. Programs and Windows expect the temporary path to exist. The safest route is Cleanup recommendations in Settings, because it handles the selection for you.

Does the Windows Temp folder automatically delete files?

Only partly. Programs usually remove their own temporary files before they quit, and Storage Sense removes unnecessary temporary files when it runs. Storage Sense is off by default, although Windows may turn it on when the PC runs low on disk space.

Can I change the Windows Temp folder location?

Yes. Edit the TEMP and TMP user variables in the Environment Variables dialog, then restart your apps. Choose a folder your account can write to, because Windows does not check access rights before it hands the path to a program.

Should I take ownership of the whole Temp folder?

No. Take ownership of only the item that refuses you, then use icacls to grant access. Changing the top-level folder can lock out other accounts and services, and a recursive takeown can replace a directory's permissions with full control for you alone.