Just had to reply to this even if 120 days old.
When someone posts how to do something like temporarily disable their AVAST Antivirus program I doubt they need threat warning advice about why not to. One might think most would already understand the common sense risk doing so would entail.
I'm not saying disabling your Antivirus program to install others is always the best thing to do and should be done with some consideration. I find most programs will install with the antivirus on and I would always try to install them with it on first. Then try doing so with it disabled, with the obviously risks to doing so taken under consdieration. But even if you do disable it and install a program, you can scan it after the install for viruses. After all, isn’t that what AVAST is also for? Finding viruses that slip by us? Why we run scans?
I noticed there was never any real clear answer or steps provided on how to disable AVAST.
Antivirus programs often run in the back ground in some capacity and with those files open they can interfere with some program installations. I found this also to be true when doing a system restore. Open running antivirus programs can interfere with system restores.