diff --git a/python/__pycache__/Bag3.cpython-313.pyc b/python/__pycache__/Bag3.cpython-313.pyc
index a01ec70..7db6056 100644
Binary files a/python/__pycache__/Bag3.cpython-313.pyc and b/python/__pycache__/Bag3.cpython-313.pyc differ
diff --git a/python/installAndExe.txt b/python/installAndExe.txt
index 0de431b..fb00b31 100644
--- a/python/installAndExe.txt
+++ b/python/installAndExe.txt
@@ -1,5 +1,35 @@
+# Bag3 Windows exe build (run all commands in this python/ folder)
+
 py -m pip install --upgrade pyinstaller
 py -m pip install --upgrade pywin32
-py -m pip install --upgrade Pillow "qrcode[pil]"
+py -m pip install --upgrade Pillow "qrcode[pil]" requests
+
+py -m PyInstaller --noconfirm --clean Bag3.spec
+
+# Output: dist\Bag3\Bag3.exe plus dist\Bag3\_internal\...
+# Copy the ENTIRE dist\Bag3\ folder to the client PC (not only Bag3.exe).
+
+# --- If the client exe flashes and closes ---
+
+1) On the client PC, open cmd in the Bag3 folder and run:
+   Bag3.exe
+   You should see the error in the console, or open bag3_startup_error.log next to Bag3.exe.
+
+2) Compare BUILD machines (both should match):
+   py --version
+   py -m PyInstaller --version
+   py -m pip show pyinstaller pywin32 Pillow qrcode requests
+
+   A broken build is often caused by:
+   - Different Python major version (e.g. 3.13 vs 3.11)
+   - Incomplete tkinter on that Python (Store Python / partial install)
+   - Old PyInstaller missing Tcl/Tk files in the bundle
+
+3) Rebuild on the machine that works, or reinstall Python from python.org (64-bit)
+   and reinstall deps above, then rebuild.
+
+4) Bag3.spec disables UPX (upx=False) for stability; do not re-enable unless you test on the client.
+
+5) Client needs 64-bit Windows and Microsoft VC++ Redistributable (same as your Python installer).
 
-py -m PyInstaller --noconfirm --clean Bag3.spec
\ No newline at end of file
+6) Antivirus may quarantine files under _internal\ — whitelist the Bag3 folder if the log mentions missing DLL.