When I click Scan and Scan for Viruses, the only option available is Boot-time Scan. I’m missing all of the other types of scans: e.g. Quick Scan, etc. Do I have to reinstall the product to get that back?
Also, if I right-click on a file or folder and then select Scan in the pop-up menu to do an On-demand Scan, an Avast box opens, but the box is completely blank and the on-demand Scan never starts. How do I fix that?
This is with Avast 2015.10.0.2208 running on a Vista Home Premium OS.
Try a repair of avast:
Vista, win7 or later - Control Panel, Programs & Features, uninstall a program, select ‘avast! Anti-Virus,’ click the Uninstall/Change and select Repair, click next and follow.
You may need to reboot after the repair.
If that doesn’t resolve it then the next step would be a clean reinstall.