Estart Center / E START App Removal After CrystalDiskInfo

If Estart Center, E START App, or E START Update Center appeared after installing CrystalDiskInfo, treat it as unwanted bundled software first, not as proof that CrystalDiskInfo itself is malware. Uninstall the E START entries normally, restart Windows, then check Startup apps, browser extensions, notification permissions, and leftover folders if pop-ups or launch entries keep returning.

Crystal Dew World states that some installers bundle the E START App installer through a GMO INSIGHT partnership, so the safer goal is to remove the bundled component without deleting the disk-health utility you meant to install.¹ If the installer came from a mirror, ad, crack site, or fake download page, handle the case more seriously because the same symptoms can also come from a separate PUA or adware installer.

What Estart Center and E START App are

E START App is a Windows program tied to the E START start-page/news service. In the CrystalDiskInfo context, users usually notice it because an ads-supported installer added an optional offer. The names can vary slightly in Windows lists: E START App, E START Update Center, Estart Center, or a related startup entry.

That does not mean the original CrystalDiskInfo project is malicious. The risk is the bundle behavior: a utility installer can leave an extra resident app, update component, browser helper, startup entry, or notification source that the user did not clearly want. That is why the cleanup should focus on installed apps and persistence points, not on deleting random system files.

Start with the normal uninstall

1. Close CrystalDiskInfo, browsers, and any E START windows.
2. Open Settings > Apps > Installed apps.
3. Search for E START, Estart, and GMO.
4. Uninstall E START App, E START Update Center, and any clearly related entry you did not intend to install.
5. If Settings does not show the item, open Control Panel > Programs and Features and uninstall it there.
6. Restart Windows before judging whether the cleanup worked.

This order matches the vendor’s own uninstall route, which points users to Control Panel or the Start menu and says Windows should be restarted afterward.² Microsoft also recommends Settings and Control Panel as the normal removal paths for Windows apps and desktop programs.³

If it comes back after uninstall

If Estart Center opens again after restart, the first uninstall either missed a related component or another bundled app is relaunching it. Check these places in order:

• Task Manager > Startup apps: disable entries named E START, Estart, update checker, shopping helper, or unknown browser helpers.
• Installed apps: remove companion entries such as update centers, shopping helpers, or recently installed apps from the same day.
• Browser extensions: check Chrome, Edge, and Firefox for search, coupon, shopping, or start-page extensions you did not add.
• Notification permissions: remove unknown sites from browser notification permissions if pop-ups appear even when the app is gone.
• Downloads and installer folder: delete the old installer after uninstalling, especially if it came from an ad or mirror.

Do not delete everything with a similar name from Windows folders. Instead, look for user-space leftovers in places such as %APPDATA%, %LOCALAPPDATA%, C:\Program Files, and C:\Program Files (x86). If you use Autoruns or Registry Editor, only inspect common startup locations such as HKCU\Software\Microsoft\Windows\CurrentVersion\Run; export a backup before changing entries manually.

When to scan for PUA leftovers

A normal bundle uninstall is enough when the app appears in Installed apps, removes cleanly, and no browser or startup symptoms remain. Run a deeper malware/PUA scan when the installer came from a download ad, a fake utility page, a cracked package, or a mirror that pushed extra software; when pop-ups continue after restart; or when unknown startup entries recreate themselves.

Gridinsoft Anti-Malware can help check for bundled apps, adware modules, startup entries, scheduled tasks, browser changes, and other persistence that a standard uninstall may leave behind. Use it after the manual uninstall if E START activity returns or if you are not sure the installer source was legitimate.

CrystalDiskInfo: keep, reinstall, or remove?

If you wanted CrystalDiskInfo and downloaded it from the official Crystal Dew World site, you can usually keep CrystalDiskInfo after removing E START. To avoid the bundle in the future, choose the ZIP/portable package or a store version when available, and avoid download buttons on ads or repack mirrors.

Remove or reinstall CrystalDiskInfo only when the file came from an untrusted source, the installer name looks suspicious, browser settings changed at the same time, or another security tool detected the installer as a PUA. In that case, uninstall the current copy, delete the installer, download a clean package from the official project page, and scan before running it again.

Browser cleanup checklist

Bundled apps often feel like a browser problem because they change start pages, search behavior, notifications, or shortcut targets. After uninstalling E START, check these browser areas:

1. Open browser extensions and remove anything added on the same date.
2. Check the default search engine, homepage, and new-tab settings.
3. Remove suspicious notification permissions from sites you do not recognize.
4. Inspect desktop and taskbar shortcuts for extra URLs after the browser path.
5. If redirects still return, follow a browser-hijacker cleanup flow such as the Gridinsoft guides for OneStart Browser and PC App Store.

Prevention for the next utility install

• Prefer ZIP/portable downloads for small utilities when the project offers them.
• Read every installer page instead of clicking through default offers.
• Avoid search-result ads that imitate the official download page.
• Keep the original installer only long enough to verify the app, then remove it from Downloads.
• If a utility unexpectedly adds a startup app, treat the whole install session as suspect and review browser settings too.

FAQ

References

1. Crystal Dew World. “Development support.” Crystal Dew World, accessed June 17, 2026. https://crystalmark.info/en/information/development-support/
2. GMO INSIGHT Inc. “E START App – Uninstallation.” E START App, accessed June 17, 2026. https://us.estart.jp/estart_app/uninstall
3. Microsoft Support. “Uninstall or remove apps and programs in Windows.” Microsoft, accessed June 17, 2026. https://support.microsoft.com/en-us/windows/uninstall-or-remove-apps-and-programs-in-windows-4b55f974-2cc6-2d2b-d092-5905080eaf98