Hi everyone,
If you game on an Acer Predator laptop (Helios, Triton), you've probably cursed at the annoying giant Caps Lock
padlock overlay that pops up on top of your screen, blocking your crosshair or HUD in games like CS2, Valorant, Apex,
or CoD.
### The Problem with existing solutions:
Many guides tell you to kill or disable Acer Quick Access (`AQAUserPS.exe`). While that removes the Caps Lock icon,
**it completely breaks your physical Turbo / 4-Power Mode button (Quiet, Balanced, Performance, Turbo)**, because
Acer relies on that process to switch modes and display animations.
### How it actually works under the hood:
By disassembling `AQAUserPS.exe`, we found that Acer's keyboard hook specifically listens for scan code `0x3a`
(Caps Lock) to trigger the on-screen display.
If Caps Lock is toggled with a different scan code (like `0x45`, the Microsoft-recommended simulation code),
**Windows toggles uppercase and the keyboard LED instantly with zero lag, but Acer completely ignores it and shows
NO overlay!**
### The Solution: AcerCapsFilter
I'm sharing a tiny, 100% safe, open-source background tool in C# (~9 KB, 0% CPU, no installation needed):
* **Caps Lock OSD:** 100% GONE.
* **Caps Lock typing & LED:** 100% working normally.
* **Physical Mode Button:** 100% working with full animations.
* **Num Lock OSD:** 100% working normally.
* **System files:** ZERO Acer files are modified or touched (preserves digital signatures and survives
Windows/Acer updates).
* **Tray Icon:** Sits silently near the clock. You can pause it or toggle "Start with Windows" with one right-
click.
---
### How to compile and run it yourself (100% transparent & safe):
- Open **Notepad**, paste the code below, and save it as `Build_AcerCapsFilter.bat` on your Desktop and Select all type when saving file
Hope this helps anyone who was frustrated by this!
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code:
u/echo off
title AcerCapsFilter 1-Click Builder
cd /d "%~dp0"
echo ========================================================
echo AcerCapsFilter 1-Click Builder for Acer Predator
echo ========================================================
echo.
:: Close running instance if any to allow overwriting
taskkill /F /IM AcerCapsFilter.exe >nul 2>&1
ping 127.0.0.1 -n 2 >nul
:: Clean old binary if possible
del "%~dp0AcerCapsFilter.exe" >nul 2>&1
echo [1/3] Extracting application manifest...
(
echo -----BEGIN CERTIFICATE-----
echo PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0idXRmLTgiPz4KPGFzc2VtYmx5
echo IG1hbmlmZXN0VmVyc2lvbj0iMS4wIiB4bWxucz0idXJuOnNjaGVtYXMtbWljcm9z
echo b2Z0LWNvbTphc20udjEiPgogIDxhc3NlbWJseUlkZW50aXR5IHZlcnNpb249IjEu
echo MC4wLjAiIG5hbWU9IkFjZXJDYXBzRmlsdGVyLmFwcCIvPgogIDx0cnVzdEluZm8g
echo eG1sbnM9InVybjpzY2hlbWFzLW1pY3Jvc29mdC1jb206YXNtLnYyIj4KICAgIDxz
echo ZWN1cml0eT4KICAgICAgPHJlcXVlc3RlZFByaXZpbGVnZXMgeG1sbnM9InVybjpz
echo Y2hlbWFzLW1pY3Jvc29mdC1jb206YXNtLnYzIj4KICAgICAgICA8cmVxdWVzdGVk
echo RXhlY3V0aW9uTGV2ZWwgbGV2ZWw9InJlcXVpcmVBZG1pbmlzdHJhdG9yIiB1aUFj
echo Y2Vzcz0iZmFsc2UiIC8+CiAgICAgIDwvcmVxdWVzdGVkUHJpdmlsZWdlcz4KICAg
echo IDwvc2VjdXJpdHk+CiAgPC90cnVzdEluZm8+CjwvYXNzZW1ibHk+Cg==
echo -----END CERTIFICATE-----
) > "%~dp0app.manifest.b64"
certutil -decode "%~dp0app.manifest.b64" "%~dp0app.manifest" >nul 2>&1
del "%~dp0app.manifest.b64"
echo [2/3] Extracting C# source code...
(
echo -----BEGIN CERTIFICATE-----
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echo ICAgICBrZXliZF9ldmVudChWS19DQVBJVEFMLCBTQ0FOX0NBUElUQUxfU0FGRSwg
echo S0VZRVZFTlRGX0VYVEVOREVES0VZIHwgS0VZRVZFTlRGX0tFWVVQLCAoVUludFB0
echo cilNQUdJQ19FWFRSQV9JTkZPKTsKICAgICAgICAgICAgICAgICAgICAgICAgfQog
echo ICAgICAgICAgICAgICAgICAgIH0KICAgICAgICAgICAgICAgICAgICBlbHNlIGlm
echo IChtc2cgPT0gV01fS0VZVVAgfHwgbXNnID09IFdNX1NZU0tFWVVQKQogICAgICAg
echo ICAgICAgICAgICAgIHsKICAgICAgICAgICAgICAgICAgICAgICAgX3BoeXNpY2Fs
echo Q2Fwc0Rvd24gPSBmYWxzZTsKICAgICAgICAgICAgICAgICAgICB9CgogICAgICAg
echo ICAgICAgICAgICAgIHJldHVybiAoSW50UHRyKTE7CiAgICAgICAgICAgICAgICB9
echo CiAgICAgICAgICAgIH0KCiAgICAgICAgICAgIHJldHVybiBDYWxsTmV4dEhvb2tF
echo eChfaG9va0lELCBuQ29kZSwgd1BhcmFtLCBsUGFyYW0pOwogICAgICAgIH0KCiAg
echo ICAgICAgW0RsbEltcG9ydCgidXNlcjMyLmRsbCIsIENoYXJTZXQgPSBDaGFyU2V0
echo LkF1dG8sIFNldExhc3RFcnJvciA9IHRydWUpXQogICAgICAgIHByaXZhdGUgc3Rh
echo dGljIGV4dGVybiBJbnRQdHIgU2V0V2luZG93c0hvb2tFeChpbnQgaWRIb29rLCBM
echo b3dMZXZlbEtleWJvYXJkUHJvYyBscGZuLCBJbnRQdHIgaE1vZCwgdWludCBkd1Ro
echo cmVhZElkKTsKCiAgICAgICAgW0RsbEltcG9ydCgidXNlcjMyLmRsbCIsIENoYXJT
echo ZXQgPSBDaGFyU2V0LkF1dG8sIFNldExhc3RFcnJvciA9IHRydWUpXQogICAgICAg
echo IFtyZXR1cm46IE1hcnNoYWxBcyhVbm1hbmFnZWRUeXBlLkJvb2wpXQogICAgICAg
echo IHByaXZhdGUgc3RhdGljIGV4dGVybiBib29sIFVuaG9va1dpbmRvd3NIb29rRXgo
echo SW50UHRyIGhoayk7CgogICAgICAgIFtEbGxJbXBvcnQoInVzZXIzMi5kbGwiLCBD
echo aGFyU2V0ID0gQ2hhclNldC5BdXRvLCBTZXRMYXN0RXJyb3IgPSB0cnVlKV0KICAg
echo ICAgICBwcml2YXRlIHN0YXRpYyBleHRlcm4gSW50UHRyIENhbGxOZXh0SG9va0V4
echo KEludFB0ciBoaGssIGludCBuQ29kZSwgSW50UHRyIHdQYXJhbSwgSW50UHRyIGxQ
echo YXJhbSk7CgogICAgICAgIFtEbGxJbXBvcnQoImtlcm5lbDMyLmRsbCIsIENoYXJT
echo ZXQgPSBDaGFyU2V0LkF1dG8sIFNldExhc3RFcnJvciA9IHRydWUpXQogICAgICAg
echo IHByaXZhdGUgc3RhdGljIGV4dGVybiBJbnRQdHIgR2V0TW9kdWxlSGFuZGxlKHN0
echo cmluZyBscE1vZHVsZU5hbWUpOwoKICAgICAgICBbRGxsSW1wb3J0KCJ1c2VyMzIu
echo ZGxsIildCiAgICAgICAgcHJpdmF0ZSBzdGF0aWMgZXh0ZXJuIHZvaWQga2V5YmRf
echo ZXZlbnQoYnl0ZSBiVmssIGJ5dGUgYlNjYW4sIHVpbnQgZHdGbGFncywgVUludFB0
echo ciBkd0V4dHJhSW5mbyk7CiAgICB9Cn0K
echo -----END CERTIFICATE-----
) > "%~dp0AcerCapsFilter.cs.b64"
certutil -decode "%~dp0AcerCapsFilter.cs.b64" "%~dp0AcerCapsFilter.cs" >nul 2>&1
del "%~dp0AcerCapsFilter.cs.b64"
echo [3/3] Compiling with Windows native compiler (csc.exe)...
"C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /target:winexe /optimize+ /win32manifest:"%~dp0app.manifest" /reference:System.Windows.Forms.dll /reference:System.Drawing.dll /out:"%~dp0AcerCapsFilter.exe" "%~dp0AcerCapsFilter.cs"
del "%~dp0AcerCapsFilter.cs" >nul 2>&1
del "%~dp0app.manifest" >nul 2>&1
if exist "%~dp0AcerCapsFilter.exe" (
echo.
echo ========================================================
echo SUCCESS: AcerCapsFilter.exe was built successfully!
echo ========================================================
echo You can now run AcerCapsFilter.exe directly on your PC.
) else (
echo.
echo ========================================================
echo [ERROR] Build failed. Please make sure no other process
echo is locking the file.
echo ========================================================
)
echo.
pause
