Most Windows lock apps are a joke.
Alt+Tab your way out. Open Task Manager. Kill the process. Done. Bypassed in 3 seconds.
I got tired of this. So at 13, I built ATLOCK.
Here's exactly how the hardening works:
1. Low-Level Keyboard Hook
Windows has a hook called WH_KEYBOARD_LL — it intercepts keystrokes at the OS level before any app can process them.
ATLOCK uses this to block:
- Alt+Tab
- Win key
- Alt+F4
- Escape
No app can bypass this. Not even Task Manager.
2. Task Manager Watchdog
A background thread runs continuously — checking every 500ms if Task Manager (taskmgr.exe), Process Hacker, or ProcExp is running.
If detected — killed instantly.
The user never even sees it open.
3. Focus Enforcement Loop
Another thread constantly calls focus_force() and grab_set() — making sure the lock screen always stays on top.
Even if something tries to push it to background — it snaps back immediately.
4. The Result
A lock screen that genuinely cannot be escaped conventionally.
No Alt+Tab. No Task Manager. No background push. Timer runs out or correct password — those are your only two options.
Why I Built This
I'm Akhouri Anmol Kumar — 13 years old, India, founder of Akhouri Systems.
ATLOCK also has File Guard (NTFS ACL-level), Password Vault with 10-hour lockout, and a Notification Panel.
Single .exe. No installation. Just run.
Feedback welcome — especially from security researchers.
GitHub: https://github.com/Akhouri-Anmol-Kumar/ATLOCK
Website: https://akhouri-anmol-kumar.github.io/Akhouri-systems
Top comments (7)
You have built a really good project, and it’s great that you’re still learning at a young age. Keep learning and keep improving like this—it’s a very good thing♥️
Thanks, The Lazy Girl
Your support makes me feel motivated in my future journey.
I will keep learning, creating and publishing my software projects.
I have a question, have you installed my App? if not then you can try it.
Akhouri Anmol Kumar
Founder & Software Developer @ Akhouri Systems
You are really 13 years old?
I visited it and really liked it.❤️
Yea, I Am.
Thanks.
Welcome Anmol!!❤️😊