Fix Windows Installer Access Denied Error

Fix Windows Installer Access Denied Error: If you are facing the error message “Access Denied” while trying to install a new program on Windows 10 or if you’re facing Msiexec.exe Access is Denied Error then you are at the right place as today we are going to fix this issue. The main cause of the error seems to corrupted or damaged Windows Installer files.

When you try to install or uninstall programs from Windows 10, you may get any one of the following warning messages:

無法訪問 Windows Installer 服務
Windows Installer Service couldn’t be started
Could not start the Windows Installer service on Local Computer. Error 5: Access is denied.

In order to fix the underlying cause of this problem, we need to re-register Windows Installer files or sometimes by simply restarting Windows Installer services seems to fix the issue. So without wasting any time let’s see how to actually Fix Windows Installer Access Denied Error with the help of the below-listed guide.

Fix Windows Installer Access Denied Error

確保建立一個還原點，以防出現問題。

Method 1: Restart Windows Installer Service

1.按Windows鍵+ R然後輸入 SERVICES.MSC 並按Enter鍵。

2.查找 Windows 安裝程式服務 然後右鍵單擊它並選擇 屬性。

3。點擊 開始 if the service is not already running.

4.If the service is already running then right-click and select 重新啟動。

5.Again try to install the program which was giving access denied error.

Method 2: Re-register Windows Installer

1.按 Windows 鍵 + X 然後選擇 命令提示符（管理員）。

2.在cmd中輸入以下命令並回車：

msiexec /取消註冊

MSIEXEC / REGSERVER

3.重新啟動您的 PC 以保存更改。

4.If the issue is not resolved then press Windows key + R then type the following and hit Enter:

%windir%system32

5.找到 msiexec.exe的 file then note down the exact address of the file which would be something like this:

C:WINDOWSsystem32Msiexec.exe

6.按Windows鍵+ R然後輸入 註冊表編輯器 並按 Enter 打開註冊表編輯器。

7.導航到以下註冊表​​項：

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesMSIServer

8.Select 微星服務器 然後在右側窗格中雙擊 ImagePath.

9.Now type the location of the Msiexec.exe file which you noted above in the value data field followed by “/V” and the whole thing would look like:

C:WINDOWSsystem32Msiexec.exe /V

10.Boot your PC into safe mode using any of the methods listed here.

11.按 Windows 鍵 + X 然後選擇 命令提示符（管理員）。

12.Type the following command and hit Enter:

MSIEXEC / REGSERVER

%windir%Syswow64Msiexec /regserver

13.Close everything and boot your PC normally. See if you’re able to Fix Windows Installer Access Denied Error，如果沒有，則繼續下一個方法。

Method 3: Reset the Windows Installer Service

1.Open Notepad then copy & paste the following as it is:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesmsiserver]
"DisplayName"="@%SystemRoot%system32msimsg.dll,-27"
"ImagePath"=hex(2):25,00,73,00,79,00,73,00,74,00,65,00,6d,00,72,00,6f,00,6f,00,
74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,6d,
00,73,00,69,00,65,00,78,00,65,00,63,00,20,00,2f,00,56,00,00,00
"Description"="@%SystemRoot%system32msimsg.dll,-32"
"ObjectName"="LocalSystem"
"ErrorControl"=dword:00000001
"Start"=dword:00000003
"Type"=dword:00000010
"DependOnService"=hex(7):72,00,70,00,63,00,73,00,73,00,00,00,00,00
"ServiceSidType"=dword:00000001
"RequiredPrivileges"=hex(7):53,00,65,00,54,00,63,00,62,00,50,00,72,00,69,00,76,
00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,65,00,61,00,
74,00,65,00,50,00,61,00,67,00,65,00,66,00,69,00,6c,00,65,00,50,00,72,00,69,
00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,4c,00,6f,00,63,00,
6b,00,4d,00,65,00,6d,00,6f,00,72,00,79,00,50,00,72,00,69,00,76,00,69,00,6c,
00,65,00,67,00,65,00,00,00,53,00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,
73,00,65,00,42,00,61,00,73,00,65,00,50,00,72,00,69,00,6f,00,72,00,69,00,74,
00,79,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,
65,00,43,00,72,00,65,00,61,00,74,00,65,00,50,00,65,00,72,00,6d,00,61,00,6e,
00,65,00,6e,00,74,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,
00,00,53,00,65,00,41,00,75,00,64,00,69,00,74,00,50,00,72,00,69,00,76,00,69,
00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,53,00,65,00,63,00,75,00,72,00,
69,00,74,00,79,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,
00,53,00,65,00,43,00,68,00,61,00,6e,00,67,00,65,00,4e,00,6f,00,74,00,69,00,
66,00,79,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,
00,65,00,50,00,72,00,6f,00,66,00,69,00,6c,00,65,00,53,00,69,00,6e,00,67,00,
6c,00,65,00,50,00,72,00,6f,00,63,00,65,00,73,00,73,00,50,00,72,00,69,00,76,
00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,49,00,6d,00,70,00,65,00,
72,00,73,00,6f,00,6e,00,61,00,74,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,
00,65,00,67,00,65,00,00,00,53,00,65,00,43,00,72,00,65,00,61,00,74,00,65,00,
47,00,6c,00,6f,00,62,00,61,00,6c,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,
00,67,00,65,00,00,00,53,00,65,00,41,00,73,00,73,00,69,00,67,00,6e,00,50,00,
72,00,69,00,6d,00,61,00,72,00,79,00,54,00,6f,00,6b,00,65,00,6e,00,50,00,72,
00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,52,00,65,00,
73,00,74,00,6f,00,72,00,65,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,
00,65,00,00,00,53,00,65,00,49,00,6e,00,63,00,72,00,65,00,61,00,73,00,65,00,
51,00,75,00,6f,00,74,00,61,00,50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,
00,65,00,00,00,53,00,65,00,53,00,68,00,75,00,74,00,64,00,6f,00,77,00,6e,00,
50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,54,
00,61,00,6b,00,65,00,4f,00,77,00,6e,00,65,00,72,00,73,00,68,00,69,00,70,00,
50,00,72,00,69,00,76,00,69,00,6c,00,65,00,67,00,65,00,00,00,53,00,65,00,4c,
00,6f,00,61,00,64,00,44,00,72,00,69,00,76,00,65,00,72,00,50,00,72,00,69,00,
76,00,69,00,6c,00,65,00,67,00,65,00,00,00,00,00
"FailureActions"=hex:84,03,00,00,00,00,00,00,00,00,00,00,03,00,00,00,14,00,00,
00,01,00,00,00,c0,d4,01,00,01,00,00,00,e0,93,04,00,00,00,00,00,00,00,00,00

[HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesmsiserverEnum]
"0"="RootLEGACY_MSISERVER000"
"Count"=dword:00000001
"NextInstance"=dword:00000001

2.Now from Notepad menu click 文件 然後單擊 另存為。

3.從 除上文所 類型下拉選擇 所有的文件。

4.將文件命名為 MSIrepair.reg (reg extension is very important).

5.Navigate to desktop or where you want to save the file and then click 保存。

6.Now right-click on the MSI repair.reg file and select 以管理員身份運行。

7.重啟你的電腦以保存更改，看看你是否能夠 Fix Windows Installer Access Denied Error.

Method 4: Reinstall Windows Installer

注意： Only Applied to earlier version of Windows

1.按 Windows 鍵 + X 然後選擇 命令提示符（管理員）。

2. 在 cmd 中鍵入以下命令，並在每個命令後按 Enter 鍵：

cd %windir%system32
attrib -r -s -h dllcache
ren msi.dll msi.old
ren msiexec.exe msiexec.old
ren msihnd.dll msihnd.old
exit

3.Reboot your PC and then download the Windows Installer 4.5 Redistributable from Microsoft website here.

4.Install the Redistributable package and then reboot your PC.

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這樣你就成功了 Fix Windows Installer Access Denied Error 但如果您對本指南仍有任何疑問，請隨時在評論部分提問。