WSUS最近WSUS不太正常，看本地的log，有一段：
 
2008-09-03 07:11:21:555 872 224 Misc WARNING: WinHttp: SendRequestToServerForFileInformation failed with 0×80190194
2008-09-03 07:11:21:555 872 224 Misc WARNING: WinHttp: ShouldFileBeDownloaded failed with 0×80190194
2008-09-03 07:11:21:555 872 224 Misc WARNING: DownloadFileInternal failed for [url]http://update.nau.edu.cn/selfupdate/wuident.cab:[/url] error 0×80190194
2008-09-03 07:11:21:555 872 224 Setup FATAL: IsUpdateRequired failed with error 0×80244019
 
注意红色部分。
查看IIS的虚拟目录，selfupdate果然没有了…
解决方法：
 
  1. Open the IIS Manager console
  2. Drill down to the Default Web Site, right click it and select New -> Virtual Directory
  3. For the alias use Selfupdate and for the path point to the Selfupdate directory. It should be something like C:\Program Files\Update Services\Selfupdate.
  4. Forward through the wizard selecting all the defaults.
参见： [url]http://blogs.technet.com/sus/archive/2008/08/14/wsus-clients-fail-to-update-with-error-code-0[/url]×80190194.aspx