Right-click the Start button and select Properties. In the Start Menu tab,
click Customize. On the General tab
Make sure that under Programs the "Number of programs on Start menu" is not
set to 0.
Also try clearing the list in the registry once, by pressing Clear List
button.
If that does not work. Go to your registry and navigate to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
Disable the two policies namely NoInstrumentation and
NoStartMenuMFUprogramsList if present.
Edit Menu > Modify > On Edit DWORD Value box enter 0 on Value data: box. A
value of 1 is enabled, and a value of 0 is disabled.
You may need to restart.