How to Solve “The user name or password is incorrect” Error in Windows 8

Problem: when assessing Windows XP PC from Windows 8 PC, Windows 8 PC always receive an error message “The username or password is incorrect” even though the user name and password is correct and previously Windows 8 PC can access or connect to the Windows XP PC.

Solution: the date and time of Windows XP PC is incorrect, change them to the current date and time.