my free avast antivirus not working

[REDACTED]

i have downloaded the free antivirus and have used it just fine in the past , now i am getting a error when i started it up saying another antivirus and two may conflict and so avast is running in passive mode , i have checked and have no other antivirus , i have antimalware bytes .
  when i try to open the interface of avast it just comes up like a blank page where the settings etc. all are its just a big square blank area of white.
I HAVE A WINDOWS 7 QUADE CORE HP LAPTOP
can someone please help me get this program going again ??

[Pondus]

i have antimalware bytes

The name is Malwarebytes Antimalware   


Try uninstall avast with this (read instructions) >> https://www.avast.com/uninstall-utility
Then try install again

IF you have used any previous AV programs make sure thay are removed according to vendors instructions / removal tools

Removal tools:
https://singularlabs.com/uninstallers/security-software/
https://support.avast.com/en-eu/article/Uninstall-other-antivirus

[REDACTED]

okay i followed instructions downloaded the avast clear to my desktop then restarted pc in safe mode (i did it without internet) and used admin install and it ran for a long time then gave this error :avast antivirus installer is unable to continue because the installer is corrupted or is forbidden to run on this machine. reason 2.
(0x000000002) the system cannot find the file specified.

[Asyn]

Update to the latest version (17.8.2318): https://forum.avast.com/index.php?topic=210678.0
Regarding Avast & MBAM, see: https://forums.malwarebytes.com/topic/200324-exclusions-for-avast-users/