flutter環境設定時のメッセージ Connected device (the doctor check crashed)

Windows10で、flutterの開発環境準備を行っています。
flutter-windows_1.17.2

FlutterConsole上でflutter doctorと打ち込んで出てくるメッセージに従い準備を進めていたのですが、下記のメッセージを解決できずに困っています。

Connected device (the doctor check crashed)

X Due to an error, the doctor check did not complete. If the error message below is not helpful, please let us know
  about this issue at https://github.com/flutter/flutter/issues.
X Exception: Unable to run "adb", check your Android SDK installation and ANDROID_HOME environment variable:
  C:（前略）\AppData\Local\Android\Sdk\platform-tools\adb.exe

「C:（前略）\AppData\Local\Android\Sdk\」を環境変数ANDROID_HOMEに設定するなどしてみたのですが、内容は変わりませんでした。

flutter doctor -v実行時の表示メッセージは下記のとおりです。

Connected device (the doctor check crashed)

X Due to an error, the doctor check did not complete. If the error message below is not helpful, please let us know
  about this issue at https://github.com/flutter/flutter/issues.
X Exception: Unable to run "adb", check your Android SDK installation and ANDROID_HOME environment variable:
  C:\Users\70486060\AppData\Local\Android\Sdk\platform-tools\adb.exe
• #0      throwToolExit (package:flutter_tools/src/base/common.dart:14:3)
• #1      AndroidDevices.pollingGetDevices (package:flutter_tools/src/android/android_device_discovery.dart:62:7)
• <asynchronous suspension>
• #2      PollingDeviceDiscovery._populateDevices (package:flutter_tools/src/device.dart:321:52)
• #3      PollingDeviceDiscovery.devices (package:flutter_tools/src/device.dart:311:12)
• #4      DeviceManager.getAllConnectedDevices (package:flutter_tools/src/device.dart:152:20)
• #5      DeviceValidator.validate (package:flutter_tools/src/doctor.dart:926:54)
• #6      asyncGuard.<anonymous closure> (package:flutter_tools/src/base/async_guard.dart:111:32)
• #7      _rootRun (dart:async/zone.dart:1184:13)
• #8      _CustomZone.run (dart:async/zone.dart:1077:19)
• #9      _runZoned (dart:async/zone.dart:1619:10)
• #10     runZonedGuarded (dart:async/zone.dart:1608:12)
• #11     runZoned (dart:async/zone.dart:1536:12)
• #12     asyncGuard (package:flutter_tools/src/base/async_guard.dart:109:3)
• #13     Doctor.startValidatorTasks (package:flutter_tools/src/doctor.dart:172:9)
• #14     Doctor.diagnose (package:flutter_tools/src/doctor.dart:271:47)
• #15     DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:60:39)
• #16     FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:723:18)
• #17     _rootRunUnary (dart:async/zone.dart:1192:38)
• #18     _CustomZone.runUnary (dart:async/zone.dart:1085:19)
• #19     _FutureListener.handleValue (dart:async/future_impl.dart:141:18)
• #20     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:682:45)
• #21     Future._propagateToListeners (dart:async/future_impl.dart:711:32)
• #22     Future._completeWithValue (dart:async/future_impl.dart:526:5)
• #23     Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:556:7)
• #24     _rootRun (dart:async/zone.dart:1184:13)
• #25     _CustomZone.run (dart:async/zone.dart:1077:19)
• #26     _CustomZone.runGuarded (dart:async/zone.dart:979:7)
• #27     _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1019:23)
• #28     _microtaskLoop (dart:async/schedule_microtask.dart:43:21)
• #29     _startMicrotaskLoop (dart:async/schedule_microtask.dart:52:5)
• #30     _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:118:13)
• #31     _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolat