diff --git a/Source/Core/UICommon/UICommon.cpp b/Source/Core/UICommon/UICommon.cpp
index 60f8ff3575f8..608d6237770a 100644
--- a/Source/Core/UICommon/UICommon.cpp
+++ b/Source/Core/UICommon/UICommon.cpp
@@ -12,6 +12,8 @@
 #include <sstream>
 #ifdef _WIN32
 #include <shlobj.h>  // for SHGetFolderPath
+
+#include <wil/resource.h>
 #endif
 
 #include "Common/Common.h"
@@ -305,51 +307,46 @@ void SetUserDirectory(std::string custom_path)
   //    -> Use GetExeDirectory()\User
 
   // Get AppData path in case we need it.
-  // TODO: Maybe use WIL when it's available?
-  PWSTR appdata = nullptr;
-  bool appdata_found =
-      SUCCEEDED(SHGetKnownFolderPath(FOLDERID_RoamingAppData, KF_FLAG_DEFAULT, nullptr, &appdata));
+  wil::unique_cotaskmem_string appdata;
+  bool appdata_found = SUCCEEDED(
+      SHGetKnownFolderPath(FOLDERID_RoamingAppData, KF_FLAG_DEFAULT, nullptr, appdata.put()));
 
 #ifndef STEAM
   // Check our registry keys
-  // TODO: Maybe use WIL when it's available?
-  HKEY hkey;
+  wil::unique_hkey hkey;
   DWORD local = 0;
   std::unique_ptr<TCHAR[]> configPath;
   if (RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Software\\Dolphin Emulator"), 0, KEY_QUERY_VALUE,
-                   &hkey) == ERROR_SUCCESS)
+                   hkey.put()) == ERROR_SUCCESS)
   {
-    DWORD size = 4;
-    if (RegQueryValueEx(hkey, TEXT("LocalUserConfig"), nullptr, nullptr,
+    DWORD size = sizeof(local);
+    if (RegQueryValueEx(hkey.get(), TEXT("LocalUserConfig"), nullptr, nullptr,
                         reinterpret_cast<LPBYTE>(&local), &size) != ERROR_SUCCESS)
     {
       local = 0;
     }
 
     size = 0;
-    RegQueryValueEx(hkey, TEXT("UserConfigPath"), nullptr, nullptr, nullptr, &size);
+    RegQueryValueEx(hkey.get(), TEXT("UserConfigPath"), nullptr, nullptr, nullptr, &size);
     configPath = std::make_unique<TCHAR[]>(size / sizeof(TCHAR));
-    if (RegQueryValueEx(hkey, TEXT("UserConfigPath"), nullptr, nullptr,
+    if (RegQueryValueEx(hkey.get(), TEXT("UserConfigPath"), nullptr, nullptr,
                         reinterpret_cast<LPBYTE>(configPath.get()), &size) != ERROR_SUCCESS)
     {
       configPath.reset();
     }
-
-    RegCloseKey(hkey);
   }
 
   local = local != 0 || File::Exists(File::GetExeDirectory() + DIR_SEP "portable.txt");
 
-  // Attempt to check if the old User directory exists in My Documents.
-  // TODO: Maybe use WIL when it's available?
-  PWSTR documents = nullptr;
-  bool documents_found =
-      SUCCEEDED(SHGetKnownFolderPath(FOLDERID_Documents, KF_FLAG_DEFAULT, nullptr, &documents));
+  // Attempt to check if the old User directory exists in Documents.
+  wil::unique_cotaskmem_string documents;
+  bool documents_found = SUCCEEDED(
+      SHGetKnownFolderPath(FOLDERID_Documents, KF_FLAG_DEFAULT, nullptr, documents.put()));
 
   std::optional<std::string> old_user_folder;
   if (documents_found)
   {
-    old_user_folder = TStrToUTF8(documents) + DIR_SEP NORMAL_USER_DIR DIR_SEP;
+    old_user_folder = TStrToUTF8(documents.get()) + DIR_SEP NORMAL_USER_DIR DIR_SEP;
   }
 
   if (local)  // Case 1-2
@@ -366,7 +363,7 @@ void SetUserDirectory(std::string custom_path)
   }
   else if (appdata_found)  // Case 5
   {
-    user_path = TStrToUTF8(appdata) + DIR_SEP NORMAL_USER_DIR DIR_SEP;
+    user_path = TStrToUTF8(appdata.get()) + DIR_SEP NORMAL_USER_DIR DIR_SEP;
 
     // Set the UserConfigPath value in the registry for backwards compatibility with older Dolphin
     // builds, which will look for the default User directory in Documents. If we set this key,
@@ -381,8 +378,6 @@ void SetUserDirectory(std::string custom_path)
   {
     user_path = File::GetExeDirectory() + DIR_SEP PORTABLE_USER_DIR DIR_SEP;
   }
-
-  CoTaskMemFree(documents);
 #else  // ifndef STEAM
   if (File::Exists(File::GetExeDirectory() + DIR_SEP "portable.txt"))  // Case 1
   {
@@ -390,7 +385,7 @@ void SetUserDirectory(std::string custom_path)
   }
   else if (appdata_found)  // Case 2
   {
-    user_path = TStrToUTF8(appdata) + DIR_SEP NORMAL_USER_DIR DIR_SEP;
+    user_path = TStrToUTF8(appdata.get()) + DIR_SEP NORMAL_USER_DIR DIR_SEP;
   }
   else  // Case 3
   {
@@ -398,7 +393,6 @@ void SetUserDirectory(std::string custom_path)
   }
 #endif
 
-  CoTaskMemFree(appdata);
 #else
   if (File::IsDirectory(ROOT_DIR DIR_SEP EMBEDDED_USER_DIR))
   {