Y-Security helps you check Windows status. It does not detect, prevent or remove the threats described here.
A status overview app for Windows 11
Windows protection status,
at a glance.
Is protection on? When were definitions updated?
Check Defender, firewall and connection information in one view.
Y-Security does not detect or remove viruses.
Windows 11 · Japanese and English
01 / FROM NEWS TO YOUR PC
How ismy PC doing?
News of an attack can make you wonder about your own PC.
Start by checking protection settings, update times and records.
02 / YOUR COMPUTER
You want to check.
Where do I look?
Is protection on? Last update? Scan records?
The details you need are in different places.
03 / WITH Y-SECURITY
Your current status.Clear at a glance.
Download after purchase, then install.
Open the app to view your current protection settings.
Microsoft Defender is included with Windows.Y-Security is a paid app that organizes protection status, update information and history. Microsoft Defender handles virus protection and is available without buying Y-Security.Explore Microsoft Defender features ↗
04 / WHAT YOU CAN SEE
Protection status and history,
all in one place.
View your status. Check the records. Notice changes.
05 / CLEARER EVERY DAY
Clarity bringspeace of mind.
See your settings and update status.
Know where to check next.
Green represents a clearer view of information. It is not a diagnosis of infection or an assurance of safety.
Digital download · Up to 5 PCs for you and your household
9,980 JPY incl. tax
One payment. No monthly fee or activation.
How does this differ from built-in Windows features?
Microsoft Defender and Windows Security are built into Windows. You can use them without buying Y-Security.
You are paying for an organized view of protection status and history, plus optional regular checks and notifications. Y-Security does not detect or remove viruses.
What information can I check?
Check Defender antivirus, real-time protection and service status, along with the virus definition version and last update time.
View firewall settings for domain, private and public networks. You can also check the connection name, interface and network type. This does not determine whether the connection is safe.
Refresh the information with one button. Refreshing does not start a scan or update virus definitions.
What happens when I select a file?
After you confirm the selected file or folder, the app calls Microsoft Defender installed on this PC. Defender performs the scan; Y-Security displays the execution result.
Y-Security has no automatic removal, quarantine or repair functions of its own. A completed scan does not establish complete safety or successful malware removal.
Can I run a quick or full scan?
These scans cannot be started from within the app. You can view recent scan times and records of scans starting, completing or stopping, as reported by Windows. Available records of automatic system scans are also shown.
Are the five-minute checks automatic scans?
No. When enabled, regular checks read protection status about every five minutes while the app is running. Notices cover protection changes, failed or restored information retrieval, and newly retrieved scan records.
A reminder also appears when the scan time retrieved from Windows is more than seven days old. This notification does not automatically start a scan.
Seven days is this app’s reminder threshold, not an infection test or a mandatory scan interval set by Microsoft. Turning off notifications does not change Windows protection settings.
Why check these settings, and what does each feature do?
The checking points after the news explain why definitions, real-time protection, firewall settings and scan records matter, and what Y-Security helps you view.
See the checking points →Which computers are supported?
For personal use on Windows 11. You can switch the app between Japanese and English. macOS, Android and iOS are not supported.
Why update definitions? Are they updated automatically?
Security intelligence helps Microsoft Defender recognize threats. Keeping it updated supports its response to new threats; delays in updating can delay that response.
Updates normally arrive through Windows Update. Y-Security shows this PC’s version and last update time. It does not install updates or compare with the latest release. Updates depend on connectivity and Windows settings.
Will I receive notices after closing the app?
If tray mode and regular checks are enabled, checks continue after you close the window. They stop when you fully exit the app. Windows notifications are optional, and whether they appear also depends on your Windows settings.
Are history and settings saved?
View and filter local history for retrieval times, successes, failures and key changes. Switch between Japanese and English. Language, regular check, tray and notification settings are saved on this PC.
Is there a monthly charge?
Y-Security costs ¥9,980 including tax, paid once, for up to 5 PCs belonging to you and your household. There is no automatic renewal or recurring charge. See the terms accepted at purchase for permitted use, updates, support and refunds.
How many PCs can I use, and can I replace a PC?
Use Y-Security on up to 5 PCs belonging to you and your household. This is a license limit; the app does not register devices or technically enforce the PC count. Distribution or resale of the installer beyond the licensed scope is not allowed.
To replace a PC, stop using the app on the old PC or uninstall it, then install it on a compatible new PC. No application to us, device release or additional transfer fee is required, provided no more than 5 PCs are in use.
The license to use the purchased version has no expiry. No activation or periodic license verification is required. Use it on up to 5 PCs within the supported environment. Compatibility with future Windows versions, updates, support and redownload availability are governed by the terms accepted at purchase.
Will a support person reply immediately?
FAQ answers are available immediately. Email y.security2026@gmail.com with enquiries about orders, downloads or features provided with your purchase. If you submit an enquiry on the website, also check the original conversation. Human support reviews enquiries in turn; it does not provide live chat or a guaranteed response time.
Do I need an internet connection?
An internet connection is needed to purchase and download. The download edition requires no activation or periodic license verification after installation. The software and Microsoft Defender run on your own PC.
Windows and Microsoft Defender updates and cloud protection, as well as online information and support, may require an internet connection.
Review the purchase and download terms →How do I start using the app after purchase?
- Download and save
Download the installer from your order page after payment is confirmed. Keep your order link and installer in a safe place.
- Install and open
Install on a compatible Windows PC. No activation code or device registration is required.
- Check the status
Use the app to view protection settings, definition information, firewall and network details. If information cannot be retrieved, do not assume the PC is safe; follow the guidance shown.
Where can I download my purchase?
Download from your order page after payment is confirmed. We also send the order page by email. Keep your private order link and a copy of the installer.
Orders & downloads →