Scenario: EUB9603H cannot detect wireless signals when installed on a
particular computer. The adapter works on another computer but not on
Computer B. It indicates that the installation of the correct and latest
EUB9603H driver is complete. Computer B is then rebooted and the EUB9603H
plugged in after the reboot. The device is detected and according to the
device manager is working properly. However, the wireless adapter would
not detect any wireless signal. The user has tried using the EnGenius WLAN
utility and the Windows Zero configuration to no avail.


Computer B has Zone Alarm, a computer security software, installed and it
was active during the installation of the driver. Uninstalling then
reinstalling the EUB9603H driver while Zone Alarm is disabled will allow
all components of the driver to be properly installed and now the wireless
adapter is working properly.

How to disable Zone Alarm.

  • Right-click the ZoneAlarm tray icon on the right-hand side of the
    taskbar. A list of options is displayed.

  • Select Shutdown ZoneAlarm (or similar, depending on the version).

  • The ZoneAlarm firewall is temporarily disabled. To reactivate it, you
    must locate the ZoneAlarm shortcut in your Start menu or on the
    desktop, and launch it. The firewall will automatically re-initialise.


Tips & Advice

It is possible to disable ZoneAlarm from automatically launching
when Windows first starts (although if you are considering this perhaps
uninstalling ZoneAlarm and relying on the perfectly adequate Windows
firewall is a worthwhile option, as it is lighter on system resources).
Simply edit the msconfig start-up list by following these steps:

  • From the Start menu, type msconfig and hit Enter to open the System
    Configuration screen.
  • Select the Start-up tab. A list of programs that automatically begin
    running when Windows first starts is displayed. In the Startup Item tab,
    search for ZoneAlarm.
  • Once located, uncheck the box beside it to disable it from Start-up.
  • ZoneAlarm will no longer launch automatically when you switch your
    computer on. This is useful if you usually perform a task that conflicts
    with the firewall when you first start Windows (such as downloading
    using P2P networks, or online gaming).

The right-click tray icon menu within ZoneAlarm also contains some other
handy quick links. One of these is Stop all Internet Activity which will
immediately block any inbound or outbound communications to and from the
internet (the same as switching off your modem or router, but much easier
and faster to access) – invaluable if you suspect a malicious
attack is currently taking place.