Cannot Install Avast

Hi all,
I tried installing the latest version of Avast on an acient notebook (since my “real” comp died), but I get the following error message. There’s enough RAM and space on the hard drive. Using Windows 95 on this one. Tried uninstalling, reinstalling, downloaded the .exe file again. I’m out of ideas. Can anyone help? Thanks.

AVAST caused an invalid page fault in
module AVAST.SETUP at 015f:00420a53.
Registers:
EAX=00f763f4 CS=015f EIP=00420a53 EFLGS=00010202
EBX=0000f9d8 SS=0167 ESP=007b763c EBP=007b7658
ECX=00f64240 DS=0167 ESI=00f64240 FS=294f
EDX=01a8f008 ES=0167 EDI=00000001 GS=0000
Bytes at CS:EIP:
8b 08 89 0e 8b 48 04 89 4e 04 8b 48 08 83 c0 0c
Stack dump:
00f763f4 00420a96 00f763f4 00f64240 007b767c 0044ffe4 ffffffff 007b7688 00420b63 00f64240 00f763f4 00000001 00470148 0000f9d8 00f64240 007b7668

Are you using any firewall? Which one?
Is there any other application (like an antivirus, etc.) that could bring an incompatibility?