If you no longer log on automatically to your computer, you PC require to press CTRL + ALT + DEL and to enter a password or you computer has more than one account and you want to login in Windows with a default account automatically without asking anything else you need to do some basic steps .
Step 1 :
Type :
WinKey+R > a black command prompt window will open > type control userpasswords2
or
Start > Search > netplwiz
or
C:Windows/system32/netplwiz.exe
Step 2 :
A window with users will pop up .
Uncheck the box with Users must enter a user name and password to use this computer, select desired User that will be automatically logged in, click Apply button.
Step 3:
In the next dialog box, enter and confirm the password for the selected User, leave it blank if you don’t want to ask for a password at log in, and then click OK button.
Step 4:
Click Ok on the User Accounts window .
I hope this will help you .
Good luck !