Alright
Now that you have the "blue ball" in the tray, right click it and click "Start avast! antivirus" (It should start memory scan again), hover over the top left 'symbol' that says "Menu - Show the program menu", then click it. A list of options should now pop-up, move down to where it says "Schedule Boot-Time Scan" and click that. A little window should appear saying "avast!: Boot-Time scanner is already scheduled. Do you want to unschedule the boot-time scan" (If you have a pop-up window that says something else, tell me) , click yes, your computer should now be restarting. And that should solve your question. Also, about your "scheduling scan" question: if you do not have professional edition than you can NOT schedule a scan at a certain time because it is not available in home edition. However, if you do have professional edition, I'll help you set it up, just let me know.
