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This wikiHow teaches you how to register a DLL, that is, create a path from the file to the Windows registry. Registering DLLs can fix some programs’ startup errors, but most DLLs are already registered or don’t support the registration process. Note: you cannot register pre-installed DLLs on a Windows computer because these files are very important to system operation and Windows updates will fix any outdated or malfunctioning DLL files. power.
Steps
Register a DLL file
![Image titled Register a DLL Step 1](https://www.wikihow.com/images_en/thumb/6/6b/Register-a-DLL-Step-1-Version-3.jpg/v4-460px-Register-a-DLL-Step-1-Version-3.jpg)
- You’ll most often use this method when registering DLLs that come from a third-party program that will interact directly with system-level resources (such as the Command Prompt).
![Image titled Register a DLL Step 2](https://www.wikihow.com/images_en/thumb/d/da/Register-a-DLL-Step-2-Version-4.jpg/v4-460px-Register-a-DLL-Step-2-Version-4.jpg)
- The “entry point” message isn’t necessarily an error, but rather a confirmation that you don’t need to register that DLL file anymore.
![Image titled Register a DLL Step 3](https://www.wikihow.com/images_en/thumb/7/73/Register-a-DLL-Step-3-Version-4.jpg/v4-460px-Register-a-DLL-Step-3-Version-4.jpg)
- For example, if you install a program that needs to register a DLL file, go to the program’s installation directory (for example, “C:Program Files[program name]”).
![Image titled Register a DLL Step 4](https://www.wikihow.com/images_en/thumb/c/c5/Register-a-DLL-Step-4-Version-4.jpg/v4-460px-Register-a-DLL-Step-4-Version-4.jpg)
![Image titled Register a DLL Step 5](https://www.wikihow.com/images_en/thumb/1/11/Register-a-DLL-Step-5-Version-4.jpg/v4-460px-Register-a-DLL-Step-5-Version-4.jpg)
- Because most DLL file names are difficult to remember, do not close this Properties window; Soon you will be able to copy the filename from here.
![Image titled Register a DLL Step 6](https://www.wikihow.com/images_en/thumb/8/8a/Register-a-DLL-Step-6-Version-4.jpg/v4-460px-Register-a-DLL-Step-6-Version-4.jpg)
![Image titled Register a DLL Step 7](https://www.wikihow.com/images_en/thumb/2/2f/Register-a-DLL-Step-7-Version-4.jpg/v4-460px-Register-a-DLL-Step-7-Version-4.jpg)
![Windows Start](https://www.wikihow.com/images_en/0/07/Windowsstart.png)
. Click the Windows icon in the lower left corner of the screen.
![Image titled Register a DLL Step 8](https://www.wikihow.com/images_en/thumb/3/31/Register-a-DLL-Step-8-Version-2.jpg/v4-460px-Register-a-DLL-Step-8-Version-2.jpg)
![Image titled Register a DLL Step 9](https://www.wikihow.com/images_en/thumb/e/e6/Register-a-DLL-Step-9-Version-2.jpg/v4-460px-Register-a-DLL-Step-9-Version-2.jpg)
- Right click
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Command Prompt.
- Click Run as administrator (Launch as administrator)
- Click Yes when the option appears.
![Image titled Register a DLL Step 10](https://www.wikihow.com/images_en/thumb/5/58/Register-a-DLL-Step-10-Version-2.jpg/v4-460px-Register-a-DLL-Step-10-Version-2.jpg)
- For example, if the DLL file is in the “SysWOW64” directory located in the “Windows” root directory, you need to enter the command:
cd C:WindowsSysWOW64
![Image titled Register a DLL Step 11](https://www.wikihow.com/images_en/thumb/1/13/Register-a-DLL-Step-11-Version-2.jpg/v4-460px-Register-a-DLL-Step-11-Version-2.jpg)
- For example, if the DLL file name was “usbperf.dll” then you would enter the command:
regsvr32 usbperf.dll
- To copy the name of the DLL file in this step, reopen the folder containing the DLL file (the Properties window will pop up), then highlight the name in the text box and press Ctrl + C . You can paste the filename into the Command Prompt with the Ctrl + V key combination.
- If the DLL file is already registered or cannot be registered, you will see an “entry point” error pop up instead of a confirmation message.
![Image titled Register a DLL Step 12](https://www.wikihow.com/images_en/thumb/4/49/Register-a-DLL-Step-12-Version-2.jpg/v4-460px-Register-a-DLL-Step-12-Version-2.jpg)
- Type the command regsvr32 /u name.dll and press ↵ Enter . Remember to replace “name” with the name of the DLL file.
- Type the command regsvr32 name.dll and press ↵ Enter , again, don’t forget to replace “name” with the DLL file name.
Re-register all DLLs
![Image titled Register a DLL Step 13](https://www.wikihow.com/images_en/thumb/7/76/Register-a-DLL-Step-13-Version-2.jpg/v4-460px-Register-a-DLL-Step-13-Version-2.jpg)
![Image titled Register a DLL Step 14](https://www.wikihow.com/images_en/thumb/e/eb/Register-a-DLL-Step-14-Version-2.jpg/v4-460px-Register-a-DLL-Step-14-Version-2.jpg)
![Windows Start](https://www.wikihow.com/images_en/0/07/Windowsstart.png)
. Click the Windows icon in the lower left corner of the screen.
![Image titled Register a DLL Step 15](https://www.wikihow.com/images_en/thumb/e/e6/Register-a-DLL-Step-15-Version-2.jpg/v4-460px-Register-a-DLL-Step-15-Version-2.jpg)
![Image titled Register a DLL Step 16](https://www.wikihow.com/images_en/thumb/0/00/Register-a-DLL-Step-16-Version-2.jpg/v4-460px-Register-a-DLL-Step-16-Version-2.jpg)
- Right click
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Command Prompt.
- Click Run as administrator
- Click Yes when the option appears.
![Image titled Register a DLL Step 17](https://www.wikihow.com/images_en/thumb/8/83/Register-a-DLL-Step-17-Version-2.jpg/v4-460px-Register-a-DLL-Step-17-Version-2.jpg)
![Image titled Register a DLL Step 18](https://www.wikihow.com/images_en/thumb/f/f4/Register-a-DLL-Step-18.jpg/v4-460px-Register-a-DLL-Step-18.jpg)
![Image titled Register a DLL Step 19](https://www.wikihow.com/images_en/thumb/0/0f/Register-a-DLL-Step-19.jpg/v4-460px-Register-a-DLL-Step-19.jpg)
![Image titled Register a DLL Step 20](https://www.wikihow.com/images_en/thumb/6/66/Register-a-DLL-Step-20.jpg/v4-460px-Register-a-DLL-Step-20.jpg)
- Open File Explorer
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(or press ⊞ Win + E ).
- Click This PC on the left side of the window.
- Double-click your computer’s OS (C:) hard drive.
- Scroll down (if necessary) until you see a file named “regdll”.
![Image titled Register a DLL Step 21](https://www.wikihow.com/images_en/thumb/e/ec/Register-a-DLL-Step-21.jpg/v4-460px-Register-a-DLL-Step-21.jpg)
- Click on the file to select.
- Press Ctrl + C .
- Click on the desktop.
- Press Ctrl + V .
![Image titled Register a DLL Step 22](https://www.wikihow.com/images_en/thumb/3/39/Register-a-DLL-Step-22.jpg/v4-460px-Register-a-DLL-Step-22.jpg)
- Right click on the “regdll” file.
- Click the Edit drop-down menu.
![Image titled Register a DLL Step 23](https://www.wikihow.com/images_en/thumb/d/d6/Register-a-DLL-Step-23.jpg/v4-460px-Register-a-DLL-Step-23.jpg)
- C:WindowsWinSXS — These lines of text are somewhere in the bottom quarter or so of the document.
- C:WindowsTemp — You will also find these lines near the entry of the previous “WinSXS” line.
- C:Windows$patchcache$ — These lines are harder to find. You can search by pressing Ctrl + F , typing $patchcache$ and then clicking Find next .
![Image titled Register a DLL Step 24](https://www.wikihow.com/images_en/thumb/c/c8/Register-a-DLL-Step-24.jpg/v4-460px-Register-a-DLL-Step-24.jpg)
- Click Edit .
- Click Replace… in the drop-down menu.
- Type c: in the “Find what” text box.
- Type Regsvr32.exe /sc: in the “Replace with” text box.
- Click Replace All
- Exit window.
![Image titled Register a DLL Step 25](https://www.wikihow.com/images_en/thumb/c/c6/Register-a-DLL-Step-25.jpg/v4-460px-Register-a-DLL-Step-25.jpg)
![Image titled Register a DLL Step 26](https://www.wikihow.com/images_en/thumb/7/7a/Register-a-DLL-Step-26.jpg/v4-460px-Register-a-DLL-Step-26.jpg)
![Image titled Register a DLL Step 27](https://www.wikihow.com/images_en/thumb/c/cb/Register-a-DLL-Step-27.jpg/v4-460px-Register-a-DLL-Step-27.jpg)
Advice
- Unregistering a DLL is useful if you want to delete a file because each registered DLL becomes a “read-only” file and so you won’t be able to delete it unless you unregister it first. .
Warning
- DLL files are very important in the proper operation of Windows. Although deleting or changing DLLs is not simple, if you do it accidentally, it can harm your computer.
This article is co-authored by a team of editors and trained researchers who confirm the accuracy and completeness of the article.
The wikiHow Content Management team carefully monitors the work of editors to ensure that every article is up to a high standard of quality.
This article has been viewed 8,874 times.
This wikiHow teaches you how to register a DLL, that is, create a path from the file to the Windows registry. Registering DLLs can fix some programs’ startup errors, but most DLLs are already registered or don’t support the registration process. Note: you cannot register pre-installed DLLs on a Windows computer because these files are very important to system operation and Windows updates will fix any outdated or malfunctioning DLL files. power.
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