**How to Fix udhisapi.dll Missing Error (Solved)**
**1. What is udhisapi.dll?**
The `udhisapi.dll` file is a Dynamic Link Library (DLL) in Windows operating systems. This crucial component helps various applications run smoothly by providing necessary functions. It’s part of the Universal Disk Helper API which assists in managing removable storage devices like USB drives and external hard disks.
**2. Why is udhisapi.dll missing?**
The `udhisapi.dll` file may go missing due to several reasons:
– Malware or virus infection that deletes system files.
– Accidental deletion by the user or during a system cleanup.
– System corruption causing the file to become unreadable or inaccessible.
– Incomplete software installation where the necessary DLL files are not installed correctly.
**3. Step-by-Step Fixes:**
**Method 1: Reinstall Visual C++ Redistributable**
The `udhisapi.dll` file is often linked to Microsoft’s Visual C++ Redistributable package. To reinstall it follow these steps:
1. Visit the [Microsoft Download Center](https://www.microsoft.com/en-us/download/details.aspx?id=52685) and download the appropriate version of the Visual C++ Redistributable package for your Windows OS.
2. Run the downloaded installation file follow the on-screen instructions and complete the setup process.
**Method 2: Run SFC /scannow command**
The System File Checker (SFC) tool can help you repair missing or corrupted system files including `udhisapi.dll`. To use it:
1. Press `Win + X` and select ‘Command Prompt (Admin)’ or ‘PowerShell (Admin)’.
2. In the command prompt type `sfc /scannow` and press Enter.
3. Wait for the scan to complete. The system may restart automatically to finish the repair process.
**Method 3: Update System Drivers**
Outdated drivers can cause compatibility issues with certain DLL files. To update your drivers:
1. Press `Win + X` and select ‘Device Manager’.
2. Expand the category for the device you suspect may be causing the issue (e.g. ‘Disk drives’).
3. Right-click on the device and choose ‘Update driver’.
4. Choose ‘Search automatically for updated driver software’ and follow the on-screen instructions to update the driver.
**4. Conclusion**
By following these methods you should be able to resolve the `udhisapi.dll` missing error in your Windows system. If the issue persists consider running a full system scan with an antivirus program to check for any potential malware threats. Additionally regularly backing up important data can help prevent loss of critical files due to unexpected system errors or accidents.