Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

For more on freeing up space on your PC, see Free up drive space in Windows. Learn how to run a disk cleanup in Windows including deleting temporary and system files to free up disk space.

All Outlook Data Files (.pst) and Offline Data Files (.ost) are listed along with the name of the account the files are associated with. If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

See plans and pricing. Find help and support content for Microsoft Phone Link. Learn time-saving tips and explore how you can use Phone Link to stay productive.

访问小型企业帮助和学习. 查找有关 Windows 操作系统的帮助和操作方法文章。. 获取对 Windows 的支持，并了解安装、更新、隐私、安全等方面的信息。.