Acer IEEE 802.11b Wireless USB Adapter - Manual (Page 66)

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6.3 Others
Additional Note for Windows 98 earlier edition
If your system is running Windows 98 first edition, you may use
one of the following ways to make IEEE 802.11b WLAN Utility
work properly.
1. Copy and replace the file MFC42.dll from c:\windows\system
of Windows 98SE to the same directory of your Windows 98
first edition.
2. Upgrade your system and IE from Microsoft web site.
P/N: 49.WS813.008