Msedgewebview2.exe High CPU: Safe WebView2 Runtime or Malware?

msedgewebview2.exe is usually a legitimate Microsoft Edge WebView2 Runtime process, not malware by itself. It appears when Teams, Widgets, Office, Outlook, Search, Weather, Clipchamp, or another app embeds web content inside a Windows program. High CPU or memory use normally means the parent app or the web content inside it is stuck. Treat it as suspicious only when the file is unsigned, runs from a user folder, keeps launching strange websites, or appears after an unknown installer, browser extension, crack, or phishing download.

Why msedgewebview2.exe uses high CPU or memory

WebView2 is not a single visible app. It is a runtime that other apps call when they need a Chromium-based web view. Microsoft explains that the executable is updated automatically and that many apps can use it, including Widgets, Teams, Office, Outlook, and Weather [1]. That is why users often see several WebView2 rows in Task Manager even when Microsoft Edge is closed.

When CPU or memory spikes, the problem is usually the app using WebView2, not the runtime file alone. A Teams panel, a Widgets feed, a sign-in page, an embedded ad view, a dashboard, or a third-party app can make WebView2 busy. The useful question is: which app owns this WebView2 process, and is the file where a Microsoft runtime should be?

Check the parent app first

1. Open Task Manager and choose the Processes tab.
2. Sort by Name, not by CPU, so Windows keeps process groups together.
3. Expand the app group that contains WebView2 or msedgewebview2.exe.
4. Close or restart the parent app, such as Teams, Widgets, Outlook, Weather, Clipchamp, or the third-party program that owns the row.
5. If CPU drops immediately, update or repair that parent app before changing WebView2 itself.

If the spike appears while you use Windows Search or the Start menu, compare it with the SearchHost.exe high CPU guide. If Task Manager points to Desktop Window Manager instead, use the dwm.exe safety and high-memory checklist. These symptoms can look similar in Task Manager, but they have different causes.

Verify the file path, signature, and parent app

1. In Task Manager, sort by Name, expand the app group, right-click its WebView2 process, and choose Open file location.
2. A common Microsoft Evergreen Runtime location is C:\Program Files (x86)\Microsoft\EdgeWebView\Application\{version}\msedgewebview2.exe. Windows components can also load Microsoft-serviced WebView2 runtime files from C:\Windows\System32. Do not delete or replace either location just because several processes are running [3].
3. Open the executable’s Properties, check the Digital Signatures tab, and confirm a valid Microsoft signature. Then return to Task Manager and confirm the parent is an app you recognize.
4. Do not confuse the runtime executable with a folder whose name ends in .WebView2. A host app can use that folder for cookies, cache, and other embedded-browser data. The executable path, signer, and parent process are the important checks.

An unsigned lookalike in AppData, Temp, or Downloads needs investigation, especially after an unknown installer or when it launches redirects. Location alone is not a verdict, however: enterprise or third-party apps can ship a fixed or custom WebView2 Runtime. Verify the signer and the app that started it before removing anything.

Is msedgewebview2.exe safe or suspicious?

Malware can abuse WebView2 technology, and attackers have used WebView2-style apps for phishing and cookie theft. That is a different case from the legitimate Microsoft runtime consuming CPU. If you received a suspicious login window, fake support prompt, or unknown WebView2 app, read the older Gridinsoft analysis of WebView2 phishing and MFA bypass abuse and treat the account as exposed.

How to fix msedgewebview2.exe high CPU

1. Restart the parent app. End Teams, Widgets, Outlook, Weather, Clipchamp, or the third-party app that owns the WebView2 group, then reopen it.
2. Update the parent app and Windows. A stale embedded page, extension, or app update can keep the runtime busy.
3. Disable unnecessary startup owners. If Teams or Widgets starts with Windows and immediately triggers high CPU, disable that app in Task Manager Startup settings and test again.
4. Clear only the affected app cache. Do this for the app that owns the WebView2 process. Avoid deleting random WebView2 folders across Windows.
5. Repair installation or update failures. If WebView2 is missing, stuck on an old version, or repeatedly fails to start, restart Windows, install pending updates, and repair the parent app. If the runtime itself still fails to install or update, use Microsoft’s current Edge and WebView2 troubleshooting path rather than a third-party DLL fixer [2].
6. Run Windows system repair only for error pop-ups. If you see “Bad Image” or application error messages, run sfc /scannow and then DISM /Online /Cleanup-Image /RestoreHealth from an elevated Command Prompt.
7. Scan when the behavior is not normal. Scan if the file path is wrong, the signature is missing, a security alert names WebView2 as the network process, or the issue began after a crack, fake update, browser extension, or phishing download.

When a WebView2 alert should trigger a malware scan

A normal WebView2 runtime can still be the process that carries traffic for a malicious page, compromised extension, fake app, or bundled adware. That does not prove the Microsoft file is infected, but it does mean you should inspect the owner app and surrounding persistence.

Run a full scan when WebView2 activity comes with any of these signs: browser redirects, push-notification spam, unknown extensions, a new app you did not intend to install, repeated outbound blocks, Defender or another antivirus alert, a file running from AppData or Temp, or scheduled tasks that recreate the same activity after reboot.

If the parent app is unknown or the activity returns after you close it, use Gridinsoft Anti-Malware to check for hidden files, startup entries, scheduled tasks, browser changes, bundled apps, and other persistence around the WebView2 event. Keep the suspected app closed while the scan runs, remove detections, reboot, and scan again only if the symptoms return.

What not to do

• Do not delete msedgewebview2.exe from Program Files or Windows folders. Apps that depend on WebView2 may break.
• Do not whitelist a suspicious WebView2-related alert just because the process name contains “Microsoft Edge”. Check the parent app and destination domain first.
• Do not install random “WebView2 remover” or “DLL fixer” downloads. They often create more risk than the original CPU spike.
• Do not assume Microsoft Edge must be open. WebView2 can run for apps even when the browser window is closed.

FAQ

References

1. Microsoft. “WebView2 end-user FAQ.” Microsoft Edge Developer documentation, accessed July 22, 2026. https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/end-user-faq
2. Microsoft. “Troubleshoot Edge Update, installation, and rollback failures.” Microsoft Edge documentation, accessed July 22, 2026. https://learn.microsoft.com/en-us/troubleshoot/microsoft-edge/manageability/update-install-rollback-failures
3. Microsoft. “Prevent security tools from blocking WebView2-hosted apps.” Microsoft Edge Developer documentation, accessed July 22, 2026. https://learn.microsoft.com/en-us/microsoft-edge/webview2/concepts/measures