Avast one free weekly scan

I keep running into this SAME PROBLEM.I have Avast ONE free on my laptop(Win 7 !!)I do weekly scans.Lately and it happened before too,when I go to scan,it show NEVER(had it done,which is absolutely WRONG)and when I try to do it,all I get is the little circle going round and round infinitely.When this happened yesterday,I re-downloaded Avast One Free,and on that,it showed scan was done one week ago,and it worked.BUT I DON’T WANT TO HAVE TO DOWNLOAD IT EVERY TIME,RESTART THE(SLOW)MACHINE,ETC.
Is there a way to PERMANENTLY avoid this very annoying thing???Please help.
Thank you!

[b]Repair & Clean Install of Avast → https://goo.gl/t7aJGq[/b]
Repair Avast:
Open the Avast User Interface > Menu > Settings > Troubleshooting > Repair App. > Restart the Computer or,
Control Panel> Program and Features (Add/remove program)>Select Avast> Select Repair. Reboot when completed
https://www.avast.com/faq.php?article=AVKB204

If Repair doesn’t fix the problem, try the following:
If your Avast settings are not the default settings and you want them restored after the Clean Install, follow this before removing Avast.
https://goo.gl/TXjM7h
Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A

Hi, best you post/ask in the dedicated forum section.
https://forum.avast.com/index.php?board=126.0