How to access main menu from the keyboard?

How can I access the main menu from the keyboard? I used to be able to get to the main menu via the “alt” key and then pressing the underlined letter of the menu item I wanted. I’m using LO 3.6.3.2 in Win7.

Pressing “alt” key + underlined letter of the menu item works fine in LO 3.6.3.2 under Win XP. Pressing only “alt” key (or F10) will allow to enter menu and move on all its items

F10
Look for “shortcut keys” in the index tab of LibreOffice help, you can find all the shortcuts.