I have made numerous attempts to install the Google toolbar (the most recent version, said to be compatible with FF3). The error message states that Google could not install the the file because of an unexpected installation error (203).
In the extensions list, Google Toolbar for Firefox 3.0.20080605W is listed, with the message "This add-on will be installed when Firefox is restarted." The browser has been restarted many times.
I have tried installing in FF safe mode, and with ZA turned off.
Running Vista SP1.
Have read widely on the Mozilla forums and am unable to resolve this problem.
Would very much appreciate your advice!