Unable and Cannot Connect to WPA and WPA2 Encrypted Wireless Wi-Fi Network in Windows XP不能和无法连接到WPA和WPA2无线加密的Wi - Fi网络，在Windows XP
After configuring the security settings of a wireless 802.11a/b/g router or access point (AP) to enable WPA or WPA2 encryption with a Pre-Shared Key (PSK or WPA-Personal/WPA2-Personal), or Radius Server (WPA-Enterprise/WPA2-Enterprise), Windows XP machine cannot or unable connect to the WPA security-enabled wireless network (although Windows XP is able to scan and detect the availability of the Wi-Fi network) with the following error message:后配置的安全设置一个802.11无线路由器或接入点（ AP ） ，以启用WPA或WPA2的加密与预共享密钥（或wpa-personal/wpa2-personal的PSK ） ，或RADIUS服务器（ WPA的-enterprise/wpa2-enterprise ） ， Windows XP的机器不能或无法连接到WPA安全功能的无线网络（虽然Windows XP是能够扫描和检测提供Wi - Fi网络）与以下错误消息：
Windows is unable to connect to the selected network. Windows是无法连接到选定的网络。 The network may no longer be in range. 网络可能不再在范围内。 Please refresh the list of available networks, and try to connect again. 请刷新列表可用网络，并尝试再次连接。
WPA (Wi-Fi Protected Access) and WPA2 (RSN Robust Security Network or IEEE 802.11i-2004) is more secure encryption algorithm for wireless or WiFi network, especially WPA2, which introduces new AES-based algorithm, CCMP encryption which is considered fully secure.的WPA （ Wi - Fi保护访问）和WPA2 （ rsn坚强有力的安全网络或的IEEE 802.11i - 2004年）是更安全的加密算法，用于无线或WiFi网络，特别是WPA2的，其中介绍了新的AES基于算法， ccmp加密这是充分考虑安全。 WPA2 certification is now mandatory for network devices to be certified by Wi-Fi Alliance as “Wi-Fi CERTIFIED”. WPA2认证是强制性的，现在的网络设备认证由Wi - Fi联盟“ Wi - Fi认证” 。
The Windows XP (with or without SP1) system does work properly and connect perfectly to the wireless network if the router, WAP (wireless access point) is configured to enable and use WEP 64-bit/128-bit/225-bit security encryption, which is less secure than WPA2 and WPA.在Windows XP （有或没有SP1 ）的系统是否正常工作和完美的连接到无线网络，如果路由器， WAP （无线接入点）是配置为启用和使用WEP 64-bit/128-bit/225-bit安全加密，这是安全性并不比WPA2和WPA的。 Beside, in Windows XP SP1 computer, the WPA encrypted wireless network can be connected without error too.旁边，在Windows XP SP1的计算机上， WPA的加密无线网络可以连接没有错误太多。 The error only surface on pre-SP2 Windows XP on both WPA and WPA2 protocols, and WPA2 on Windows XP SP2.错误的，只有表面上SP2之前的Windows XP中就双方WPA和WPA2协议，和WPA2在Windows XP SP2上。
By default, Windows XP does not has native support for WPA in Windows XP (which only added via默认情况下， Windows XP不会有本土的支持WPA的在Windows XP中（其中只有补充，通过 KB815485 WPA support patch kb815485的WPA支持补丁 and via Service Pack 2), and no native support for WPA2 until Windows XP SP3.和VIA Service Pack 2中） ，并没有本土的支持WPA2的，直到Windows XP的SP3中。 To verify that the unable or cannot connect to the wireless network is indeed cause by lack of support in Windows XP, right click on the Network Connections icon on the system tray (notification area), then go to Wireless Network tab.以验证该不能或无法连接到无线网络确实是事业因缺乏支持在Windows XP中，右击网络连接的图标，系统托盘（通知区域） ，然后转到无线网络选项卡。 Select or manually add in the SSID for the wireless network, then click on Data Encryption option.选择或手动添加在的SSID为无线网络，然后点击数据加密选项。 If Windows XP supports WPA and WPA2, you will see its options appear in the drop-down list, in addition to usual WEP.如果Windows XP支持WPA和WPA2 ，您会看到其选项出现在下拉式清单中，除了惯常的WEP 。
To let Windows XP pre-SP2 system provides support for WPA WiFi network security encryption method, download and install让Windows XP的SP2之前的系统提供了支持WPA的无线网络安全的加密方法，请下载并安装 KB815495 kb815495 ( （ KB article KB文章 ), or upgrade to ） ，或升级到 Windows XP SP2在Windows XP SP2 . 。
To provides operating system support for WPA2, download and install the newer以提供作业系统，支援WPA2的，请下载并安装较新的 KB917021 kb917021 Wireless Client Update for Windows XP with Service Pack 2 (validation required at无线客户端更新为Windows XP Service Pack 2的（必要的验证，在 Microsoft Download Center Microsoft下载中心 , or user can direct download the ，或用户可以直接下载 WindowsXP-KB917021-v3-x86-ENU.exe windowsxp - kb917021 - v3的- x86的enu.exe ) or older ）或以上 KB893357 kb893357 Wi-Fi Protected Access 2 (WPA2) and Wireless Provisioning Services Information Element (WPS IE) update for Windows XP SP2 (validation required at Wi - Fi保护访问2 （ WPA2 ）以及无线配置服务信息元素（ WPS IE ）更新适用于Windows XP SP2 （在必要的验证 Microsoft Download Center Microsoft下载中心 , or user can direct download the ，或用户可以直接下载 WindowsXP-KB893357-v2-x86-ENU.exe windowsxp - kb893357 -的V2 - x86的enu.exe ) or more recommended, upgrade to ）或以上建议，请升级到 Windows XP SP3 Windows XP的SP3的 , which now incorporates the WPA2 hotfix and implements the WPA2 IEEE 802.11i wireless networking standard natively. ，它现在包含了WPA2的修补程序和实施的WPA2的IEEE 802.11i无线网络标准natively 。
After installing the WPA and/or WPA2 support into Windows XP and restarting the computer, if the system has a client wireless card with WPA/WPA2-capable firmware and WPA/WPA2 drivers, Wireless Zero Configuration (WZC) displays a WPA2 designation when user view the available wireless networks.安装后的WPA和/或WPA2的支持到Windows XP ，并重新启动电脑，如果系统有一个客户端的无线网卡与wpa/wpa2-capable固件和wpa/wpa2司机，无线零配置（ wzc ）显示的WPA2指定当用户查看可用的无线网络。 For example, Security-enabled wireless network (WPA) and Security-enabled wireless network (WPA2) , instead of just plain “Security-enabled wireless network”.举例来说， 安全性，使无线网络（ WPA的）和安全功能的无线网络（ WPA2的） ，而不是只平原“安全启用无线网络” 。
As mentioned just now, operating system support for wireless security protocol especially WPA2 is just a piece of the jigsaw puzzle.正如刚才所说，作业系统，支援无线安全协议，特别是WPA2是刚才一块的拼图游戏。 The PC must also has client wireless card, or built-in wireless receiver, or Wi-Fi network adapter that supports WPA and WPA2.筹委会还必须有客户端的无线网卡，或内置的无线接收器，或Wi - Fi网络适配器，支持WPA和WPA2 。 If you just bought the wireless network adapter recently, chance are the WLAN adapter will support WPA and WPA2 by default.如果你只是买了无线网络适配器最近，机会是无线局域网适配器将支持WPA和WPA2默认情况下。
If after installing the WPA2 (or WPA) update hotfix or latest service pack in Windows XP, yet WPA or WPA2 is still unsupported and system unable to connect to wireless network, check the website of the WLAN adapter or wireless card for any new updated WLAN driver that capable of enabling WPA and WPA2 functionality on the WiFi receiver adapter card.如果在安装的WPA2 （或WPA ）更新修补程序或最新的Service Pack在Windows XP中，尚未的WPA或WPA2是仍然不受支持和系统无法连接到无线网络，检查该网站的无线局域网适配器或无线网卡任何新的更新无线局域网驱动程序，能够使WPA和WPA2功能，在WiFi接收适配卡。 Some WLAN adapter may require a firmware update to support WPA and WPA2.一些无线局域网适配器可能需要一个固件更新，支持WPA和WPA2 。
If you have an old wireless card that the only option available is WEP, and has no updated driver for it, then WPA/WPA2 won’t work simply because the WLAN adapter does not support it.如果你有一岁的无线卡，这种卡的唯一选择是WEP的，并没有更新的驱动程序的话，那么wpa/wpa2将不会工作，只是因为无线局域网适配器不支持它。 In this case, fallback to WEP encryption, or get a new wireless adapter.在这种情况下，后备，以WEP加密，或得到一个新的无线适配器。
IMPORTANT : This is a machine translated page which is provided "as is" without warranty. 重要说明 ：这是一个机器翻译网页是“按原样”提供的担保。 Machine translation may be difficult to understand.机器翻译可能很难理解。 Please refer to请参阅 original English article原来的英语文章 whenever possible.只要有可能。
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