Smart Scan fixed at 67%

[wuxianshen]

I installed Avast Internet Security on a win 10 computer. Because my computer seems to have some virus like Main.ru since the browser keeps on coming up some webpages from RUVI.tv. So I run the smart scan from avast to fix this problem.
But the scan progress fixed at 67% and don't change any more for almost ten hours. Is there any problem with my software?

[Be Secure]

Repair Avast:
1. Avast GUI -> Settings -> Troubleshooting
2. Click on 'REPAIR APP'.
3. Follow instructions.
4. Reboot.

[bob3160]

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