[AvLaunch.exe problems]

A couple days ago, Avast loaded onto my computer while I was downloading an update for CCleaner.  I went to Avast support for help in removing it, as it would not allow me to do it (said I didn't have authorization).  At this time, apparently a file called AvLaunch.exe also loaded.  It is still there, and it is messing with my computer performance, bigtime.  It's killing my battery, starting programs (like Edge) which I have repeatedly turned off, won't let me chat or communicate directly with Malwarebytes, slow load times, etc.  I need help.  This is further complicated by the fact that I'm currently in Central America where I can't make or receive calls - so I am depending on this forum!  I can't use my phone, and I can't use MWB page to email or chat with them.  Please help!