diff --git a/README.md b/README.md
index 87fc37a..a737efa 100644
--- a/README.md
+++ b/README.md
@@ -37,4 +37,28 @@ Lines marked `[FLAG]` are issues, and they are listed again in the **SUMMARY** a
 | One process with high CPU% | Software issue, not hardware |
 | Power mode = Best power efficiency | Settings → System → Power & battery → change Power mode |
 
+### Requirements
+- Windows 10 or 11, run as Administrator
+- Office network or VPN (to reach git.abyres.net)
+
+### Options (for IT)
+```
+# Skip the load test
+& ([scriptblock]::Create((irm https://git.abyres.net/kasyfur/it-support-scripts/raw/branch/main/laptop-check.ps1))) -NoLoad
+
+# Longer load test (60 s)
+& ([scriptblock]::Create((irm https://git.abyres.net/kasyfur/it-support-scripts/raw/branch/main/laptop-check.ps1))) -LoadSec 60
+```
+
+### Troubleshooting
+| Problem | Fix |
+|---|---|
+| `irm` cannot connect | Connect to the office network or VPN |
+| "Not run as Administrator" flag | Reopen with Win + X → Terminal (Admin) |
+| Temperature not changing | The built-in sensor isn't live; use HWiNFO or Acer Care Center |
+
+### Changelog
+- **v2 (27 Oct 2026):** Battery health from battery report, CPU load test, shutdown cause, interrupt/DPC time, power mode via Windows API
+- **v1 (27 Oct 2026):** Initial release
+
 Reference (i3-1315U, TravelMate P214-55): about 2,400 MHz plugged in and about 1,600–1,900 MHz on battery under load is normal.
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