PC 正常性チェック アプリは、お使いの Windows デバイスの正常性に関する最新の情報を提供して、デバイスのパフォーマンス向上のための対処や、パフォーマンス問題のトラブルシューティングに役立ちます。

Windows 10、Windows 8.1、および Windows 7 用の Windows Media Player 12 の入手方法について説明します。

Learn how to connect your Windows PC to external monitors and adjust the display settings.

Microsoft アカウントパスワードをリセットまたは変更する方法について説明します。 忘れた Microsoft アカウントのパスワードに関するヘルプを表示します。

Keeping Bing as your default search engine provides an enhanced search experience in the new Microsoft Edge , including direct links to Windows apps, relevant suggestions from your organization if you’re signed in with a work or school account, and instant answers to questions about Windows.However, you can change the default search engine to any site that uses OpenSearch technology.

Learn how to update Windows to ensure your device operates smoothly and securely with the latest features.

Most tools and options in Microsoft Edge are available when you select Settings and more > Settings.

Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.

If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.

You can repair some apps and programs if they're not running correctly. Note that you won't see repair, change, or modify options for all apps and programs.