Change the Auto Complete Mode (All Windows)

This setting controls whether the automatic text completion (AutoComplete) feature of Windows Explorer appends the suggested text to the words as you are typing as well as showing a drop-down list of available values.

1.Open your registry and find the key below.
2.Create a new string value, or modify the existing value, named "Append Completion" and set it to "yes" to append the suggested text as you are typing or "no" to only show a drop-down list.

Restart Windows for the change to take effect.

Note: This setting also changes the auto complete functionality of Internet Explorer.

Registry Settings
User Key : [HKEY_CURRENT_USER\Software\Microsoft\Windows \CurrentVersion\Explorer\AutoComplete]
Value Name : Append Completion
Data Type : REG_SZ (String Value)
Value Data : yes or no

Disclaimer : Modifying the registry can cause serious problems that may require you to reinstall your operating system. We cannot guarantee that problems resulting from modifications to the registry can be solved. Use the information provided at your own risk.