FAQ: add admin 1-click login issue on Windows (#52)

FAQ.md

@@ -20,6 +20,7 @@
   - [My plugins are gone or my config profile is missing](#my-plugins-are-gone-or-my-config-profile-is-missing)
   - [My Loot Tracker data is gone](#my-loot-tracker-data-is-gone)
   - [I want to transfer my settings to another computer](#i-want-to-transfer-my-settings-to-another-computer)
+  - [Wrong username and password after starting via the Jagex Launcher](#wrong-username-and-password-after-starting-via-the-jagex-launcher-on-windows)
   - [The Jagex launcher is stuck on Install on macOS](#the-jagex-launcher-is-stuck-on-install-on-macos)
   - [RuneLite is making me disconnect!](#runelite-is-making-me-disconnect)
   - [RuneLite is making my computer crash!](#runelite-is-making-my-computer-crash)
@@ -196,6 +197,11 @@ You can either copy the whole `.runelite` folder to your new computer or you can
 - To sync your profile, go to `Configuration` (wrench icon) > `Profiles` (middle tab). Select the profile you want to sync and click on the cloud icon (`Enable cloud sync`). If the icon is orange, then cloud sync is enabled. You could try to disable and re-enable cloud sync if it does not sync properly.<br>
 ![config-profile-sync](https://user-images.githubusercontent.com/7191512/222978342-584d4842-38e4-40f7-8757-7085f016a5ad.png)
 
+# Wrong username and password after starting via the Jagex Launcher on Windows
+After you've migrated to a Jagex account, you are no longer required to type your username and password in to login. If you are still prompted for this info, it's very likely your RuneLite is running as admin, which breaks 1-click login.  
+You can fix this by un-checking the `Run this program as administrator` box in Windows Properties settings.
+![](img/faq/faq_disable_admin.png)
+
 ## The Jagex launcher is stuck on Install on macOS
 Unlike on Windows where the Jagex launcher can check where your RuneLite is installed, on macOS it expects RuneLite to be in the applications folder. Moving it to the applications folder will resolve your issue.