Log on as an administrator, go Start
and type: "cmd". In the window that appears type: "netsh winsock reset". When the program is finished, you will receive the message: "Successfully reset the Winsock Catalog. You must restart the machine in order to complete the reset." Close the command box and reboot your computer.
> type: "cmd" In the window that appears type: "ipconfig /flushdns". Close the command box.
> Control Panel
> Network Connections
. Right click on your default connection, usually Local Area Connection
or Dial-up Connection
if you are using Dial-up, and and choose Properties
. Double-click on the Internet Protocol (TCP/IP)
item. Select the radio button that says "Obtain DNS servers automatically". Reboot.
Then try the updates again.
Personally I think you should never use a registry cleaner such as Iobit. If you must use a registry cleaner you should create a new restore point and backup the registry
first. For backing up the registry I like to use ERUNT