Check Name resolution For the host lookups /etc/nsswitch.conf and /etc/host.conf should be configured to use DNS. Also DNS servers list as well as the primary domain prefix (‘search’ or ‘domain’ parameters in /etc/resolv.conf ) should be set. The ‘A’ record should be specified for the server’s hostname. As you might know the host names are retrieved from the following files and they should be identical: The localhost entry should be in the /etc/hosts . Network configuration should Read more

Usually in MS systems any device requesting for IP address will get IP from DHCP server without any authentication. DHCP MAC address authentication can help prevent unauthorized devices to connect corporate network. With DHCP Server Callout DLL installed Windows administrators can filter DHCP requests to DHCP server by Mac address. DHCP Server Callout DLL checks if this device MAC address is present in known list (text file) of MAC addresses configured by administrators If it is present, device will Read more

Outlook doesn’t open EML attachment or EML files saved on desktop.
The solution is simple..
Uninstall Google Desktop Search

"The operation has been canceled due to restrictions in effect on this computer. Please contact your system administrator." Or "This operation has been canceled due to restrictions on your computer" They are few solutions: Reset Web settings Start Internet Explorer On the Tools menu, click Internet Options . Click the Programs tab , and then click the Reset Web Settings button. Under Internet programs, verify that the correct e-mail program is selected Click to select Read more