Consider the following scenario:

• You are running a Windows Vista Service Pack 1 (SP1)-based computer.
• Antivirus and antispyware with e-mail scanning software is installed on the computer.
• An e-mail client, such as Microsoft Office Outlook or Windows Mail, is configured to receive POP3 or SMTP e-mail messages.

When you start the e-mail client, or when you try to send or receive e-mail messages, Windows Vista crashes. Additionally, you receive the following Stop error message:

STOP: 0×1000008E (Parameter1, Parameter2, Parameter3, Parameter4) In TCPIP.SYS
KERNEL_MODE_EXCEPTION_NOT_HANDLED_M

Note: This issue does not occur if one of the following conditions is true:

• The e-mail client is configured to receive HTTP e-mail messages instead of POP3 or SMTP e-mail messages.
• The e-mail client works offline.