Problem Installing Quartus II v11.0 Web Edition

Oh and I don't know what the release notes suggest about requiring administrative credentials to install, but you should ensure that you're following the recommended path of either installing it when logged in as a user with administrator rights, or by granting the necessary permissions via UAC escalation or whatever.

Here's some resources about the installation process. I seem to recall I had to dig pretty deeply into the

Altera web site and knowledge base to find useful tidbits relating to some important installation instructions that seemed not to be covered by the readme / release notes and such files that were obviously present in the installation files.

http://quartushelp.altera.com/current/mergedprojects/global/install/gl_view_install.htm

http://www.altera.com/literature/manual/quartus_install.pdf