Unfortunately I had to re-install Arch about a week ago (Early February) and afterwards my Office applications would no longer start (my home is on a separate partition so I didn't have to reinstall Office). Nothing I tried could get Office 2010 to work properly. I deleted my .wine and .PlayOnLinux folders and tried to reinstall.
I either couldn't get it to install, or could get it to install, but activation over the Internet would not work. I didn't want to call Microsoft even though that would probably have been the easiest solution. I tried exporting WINEARCH="win32" but the installer then crashed.
What I finally had to do was uninstall wine and all its dependencies and then install bin32-wine-snapshot from the AUR. After that everything was just great.
# packer -S bin32-wine-snapshot # or yaourt or whatever...
$ export WINEPREFIX="${HOME}/.msoffice2010"
$ export WINEARCH="win32"
$ wine my-installer.exe
Done, and it activated with no issue.
