方法1.暂时禁用您的防病毒如果您安装了Avast或其他第三方防病毒软件，我们建议您暂时禁用或卸载它，然后检查Windows Live Mail是否仍然存在故障。如果此方法有助于修复0x800CCC90错误，请确保彻底删除罪魁祸首并安装另一个有信誉的反恶意软件。方法2.修复Windows Live MailWindows 10/8右键单击“Windows键”并选择“控制...
Outlook Express Error Code 0x800ccc90:‘There was a problem logging onto your mail server. Your User Name was rejected. Account: ‘server name’, Server: ‘server name’, Protocol: POP3, Server Response: ‘-ERR Invalid command.’, Port: 110, Secure (SSL): No, Server Error: 0x800ccc90...