UiHost.exe application error is a troublesome issue, making you unable to start correctly UiHost.exe. Since the UiHost.exe is related to the WebAdvisor app, the app will fail to run if the UiHost.exe application error occurs. So, how to fix the error? This post on MiniTool will give you a guide.

UiHost.exe Application Error

UiHost.exe stands for the executable of McAfee’s Web Advisor browser extension, which can be compatible with many browsers and control many functions of the program. When the UiHost.exe application error occurs, McAfee WebAdvisor cannot run and your system will be vulnerable to outer attack without the protection.

UiHost.exe can help finish the following tasks, such as:

  • Provides security risk ratings for websites;
  • Real-time monitoring to protect from phishing scams and other malware.
  • Issue alerts for possible threats, etc.
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Fix: UiHost.exe Application Error

Fix 1: Check UiHost.exe File

First of all, you should make sure the UiHost.exe file is a legitimate and genuine McAfee file.

Step 1: The real file location should be C:\Program Files\McAfee\WebAdvisor\UIHost.exe and you can go to this location. If the UiHost.exe file is located in another place, it is probably a virus.

Step 2: Right-click on UiHost.exe and choose Properties.

Step 3: In the Digital Signatures tab, check the names under the Signature list are McAfee. LLC; if not, the file is suspicious.

Fix 2: Update McAfee WebAdvisor

You’d better make sure McAfee WebAdvisor has been up to date, which can fix some existing bugs. Here, we will take Chrome as an example.

Step 1: Open Chrome and click the three-dot icon on the top right corner.

Step 2: Choose Extensions > Manage Extensions and turn on the Developer mode option.

Step 3: Click Update and wait for the update to be completed.

Fix 3: Update the Browser

It is also important to keep your browser up to date to avoid compatibility issues and conflicts with system files.

Step 1: Launch Chrome and click the three-dot icon on the top right corner.

Step 2: Choose Help > About Google Chrome.

Step 3: Then you will see Chrome automatically detect the latest version and you can download and install it.

update browser

Then you can relaunch Chrome to see if the UiHost.exe McAfee WebAdvisor application error has been gone.

Fix 4: Disable Other Browser Extensions

You can disable other extensions to avoid conflicts and see if the UiHost.exe application error Windows 10 issue can be fixed.

Step 1: Go to Manage Extensions in Chrome and turn off all the extension toggles except Web Advisor.

Step 2: Check if the problem persists. If not, you can enable the extensions one by one to identify which one is the culprit and then remove it.

Fix 5: Reinstall McAfee Antivirus

Furthermore, you can reinstall the McAfee antivirus to fix the UiHost.exe application error.

Step 1: Right-click on the Start icon and choose Apps & Features.

Step 2: Scroll down to locate McAfee antivirus and choose Uninstall > Uninstall.

Step 3: After the uninstallation, please download and install McAfee from the official source. For detailed steps, you can refer to this article: Is McAfee Safe for Your Windows/Mac? Here Are the Answers.

Other Tips for UiHost.exe Application Error

1. Scan your system for viruses and malware.

2. Try clean boot to avoid software conflicts.

3. Reset or re-install your Windows.

Bottom Line:

To fix the UiHost.exe application error, the above methods are useful and you can try them one by one. To better protect your data, try MiniTool ShadowMaker and back up your data.

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