???

OK I went to the console and used sudo dpkg to install.

However, here is the result.

I should have told you my system is a opteron 170 with 1 gig of ram (AMD64).

ralph@ralph-desktop:~$ sudodpkag -i avast4workstation_1.0.6-2_i386.deb
bash: sudodpkag: command not found
ralph@ralph-desktop:~$ sudo dpkg -i avast4workstation_1.0.6-2_i386.deb
Password:
dpkg: error processing avast4workstation_1.0.6-2_i386.deb (–install):
package architecture (i386) does not match system (amd64)
Errors were encountered while processing:
avast4workstation_1.0.6-2_i386.deb
ralph@ralph-desktop:~$