Windows Explorer Starts every time you start your computer.

Navigate to

HKEY_LOCAL_MACHINE\ SOFTWARE\ Microsoft\ Windows NT\ CurrentVersion\ Winlogon

Find and modify Userinit as shown below:

From:

"Userinit"="C:\WINDOWS\SYSTEM32\USERINIT.EXE,C:\WINDOWS\SYSTEM32\USERINIT.EXE,"

To:

"Userinit"="C:\WINDOWS\SYSTEM32\USERINIT.EXE,"