user interface is completely white

hi when i try to open my user interface it appears a completely white page

Try this method

  1. Go to Programs and Features
    2.Select Avast and click Repair
    3.Wait till finish and reboot PC

If that does not work it is a PC problem try to just wait.

If that dosen’t work then i am not good at this

Thank you for the answer but I have already done it and it didn’t work

If Repair doesn’t fix the problem, try the following:
Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A