Open your registry and find the key below. 

Create a new DWORD value, or modify the existing value called 'NoRecentDocsHistory' set the value to equal '1' to enable the restriction. 

Key:[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
Value Name: NoRecentDocsHistory
Data Type: REG_DWORD
Data:(0 = disable restriction, 1 = enable restriction)

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