If your Windows operating system may not be updating properly (see Control Panel\System and Security\Windows Update\View update history) via a proxy server, this instruction may help.
netsh winhttp show proxy
netsh set proxy facultyproxy.upd.edu.ph:8080
netsh winhttp show proxy
net stop wuauserv
cd %systemroot%\SoftwareDistribution
ren Download Download.old
regsvr32 %windir%\system32\wups2.dll
net start wuauserv
NET START BITS
NET START WUAUSERV
SC QUERYEX BITS
SC QUERYEX WUAUSERV
You may be prompted for your username and password to be able to use the proxy server to update Windows.