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Upgrade to the next-gen Microsoft Windows Server 2016



Good afternoon people. I have Windows 2008 Server R2 Enterprise SP1. And installed an application and acquired using the .NET Framework 4 and MySQL 5.6 that access so via browser 192.168.1.250:8443 . The console him quiet wheel if there are only a few users connected until they begin all endpoints to connect to it , after about 5 minutes when more than 40 connected begins to occur the error that will report the following . Tested by disabling the Windows Firewall to check if that was but is not, since reinstalled the Net. Framework, redid the database and still is that the application becomes unresponsive , it no longer opens the administrative console , and when I in the event viewer follows the error:

An operation was attempted on a nonexistent network connection

at System.Net.HttpResponseStream.Dispose(Boolean disposing)
at System.IO.Stream.Close()
at System.Net.HttpListenerResponse.Dispose(Boolean disposing)
at System.Net.HttpListenerResponse.System.IDisposable.Dispose()
at System.Net.HttpListenerResponse.Close()
at avware_lib.webserver.CWebServer.<Run>b__16_1(Object c)

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WINDOWS 2008 DHCP SERVER WITH SCOPE AND RESERVATION
http://bit.ly/1TEetjf

my wds server is on network segment 192.168.200.0/24 where there's not dhcp server. in second segment (192.168.0.0/24) is dhcp server, Domain controller and workstations on them have to install win 7. i configured mikrotik dhcp server with option 66 = 192.168.200.28 option 67 = boot\x86\pxeboot.n12. on cisco router that is between 192.168.0.0/24 and 192.168.200.0/24 i set ip helper-addres on interface that is in segment 192.168.0.0/24. on wds is disabled firewall, there's not antivirus program.
i tested, i installed dhcp server,secondary DC in segment 192.168.200.0/24 i booted workstation in network segment where is wds and process installation is ok. wds works ok.
when i boot workstation over network i receive
pxe-e32: tftp open timeout
where's i made mistake?

Hola alguien me pordria ayudar... Tengo Win Server 2008 R2 y estoy teniendo problemas porque una maquina virtual que tengo instalado ahí, no conecta a Internet, no tiene acceso a la red.. ya no se que mas tocar. Y lo raro es que pasa con una maquina virtual en particular ya que hasta hace una semana todas las maquinas virtuales instaladas  funcionaban perfecto y siguen salvo ésta.
Espero pronta respuesta :) 
Saludos

We are using windows server 2008 . We face problem in C drive that it shows wrong disk space. Actually free size for the disk is 24gb but it shows only 10.6 GB.please how to troubleshooting this issue

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Still Using Windows Server 2003? Now, It is time to upgrade. Microsoft has announced End of Support For Windows Server 2003 From July 14, 2015.

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Finally, Microsoft has released a fix against FREAK Vulnerability in its regular Patch Tuesday updates.

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