what is "C:\WINDOWS\WinSxS\x86_Microsoft.Windows.WinHTTP_6595b64144ccf1df_5.1.3790.4427_x-ww_FDB042FC\" why this folder exist in some windows in network only ? how it created ?how can i createed on other computers ?

The WinSxS folder stores information for side-by-side assemblies, http://msdn.microsoft.com/en-us/library/aa376307(VS.85).aspx http://msdn.microsoft.com/en-us/library/aa374224(VS.85).aspx It would seem that that particular one is for Windows Server 2003 and before dealing with WinHTTP, http://msdn.microsoft.com/en-us/library/aa384082(VS.85).aspx -- Mike Burr

this folder exist on 2pc only, what application,Microsoft update,... cause to create it ?

It appears that it is installed with the OS, http://msdn.microsoft.com/en-us/library/aa384276(VS.85).aspx What are the OS/Version of the systems that do and don't have it on your network? -- Mike Burr

What is the WINSXS directory in Win2008 and Vista and why is it so large? http://blogs.technet.com/askcore/archive/2008/09/17/what-is-the-winsxs-directory-in-windows-2008-and-windows-vista-and-why-is-it-so-large.aspx Here are some suggestions for freeing up disk space: http://www.winvistaclub.com/t73.htmlShaon Shan| TechNet Subscriber Support in forum| If you have any feedback on our support, please contact tngfb@microsoft.com