Atguard

@Guard stopped animated gifs after one cycle. Note @Guard has been bought by Nortons and will not be updated. Once you upgrade to ME you can forget about using it.

The ad-blocking option can stop the 'open in new window' function from working in IE, and also prevent javascript buttons that link to new windows from working as well.

It can cause 'fail to get DOM' errors when using Windows Update.

You may receive the following error message on a blue screen on your Windows XP-based computer with the WRQ AtGuard firewall program installed:
STOP: 0x000000D1 (0x0200000c, 0x00000002, 0x00000000, 0xf617c2c6)

DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)
Argument 1: 0200000c, memory that was referenced
Argument 2: 00000002, IRQL
Argument 3: 00000000, value 0 = read operation, 1 = write operation
Argument 4: f617c2c6, address that referenced memory

Note The four parameters that are inside the parentheses may vary according to the computer's configuration.
http://support.microsoft.com?scid=kb;EN-US;Q319870

Windows ME may stop responding (hang) during startup and shutdown
http://support.microsoft.com?scid=kb;EN-US;Q261766

You may receive the following error when you try to access the Windows Update web site: Error 403: Access Denied/Forbidden
http://support.microsoft.com?scid=kb;EN-US;Q245142

Blank page when you try to access Windows Update
http://support.microsoft.com?scid=kb;EN-US;Q193701

Money Error Message: An error was encountered while processing a download file (sponsor.cab) during smartconnect:
http://support.microsoft.com?scid=kb;EN-US;Q272940