Nobody any solution?

Does the dev team know about this issue?

Does anybody know, if the upcoming version 17.8. will fix the problem?

Just to chip in that I am one of those that has 17.17.2314 working fine on XP SP3 Pro. I didn’t need to do anything special just normal update when this version was released.
The GUI is slow to fully load, as documented by others and is by design. I find it no different from running on Win10, except some peculiarities with SmartScan, but that is another story and subject of a separate thread.
Ed

Ditto. I have Avast free 17.7.2314 working fine with Windows XP on two PCs. I was thinking to myself how well-behaved it is, better in fact than previous versions. Both systems are POSReady security patched and fully up-to-date.

My last post from November 19, 2017, 09:49:45 PM was removed, I don’t know why. So I copy it here:

Hello to everybody,

I have good news to share:

Since my last post I installed 17.8.2318, build 17.8.3705.0, observed it for a while. I’m sure now the bug is gone, and that on all our XP machines (including the Home Edition). Same for my personal XP system at home.
I don’t know why, but I’m glad about it and wanted to share this.

Thanks to every contributor!