Had the exact same probe as original post. Purchased new laptop with Windows 7 Professional as the O.S.
I tried installing CS3 after installing XP mode for Windows 7. The installed Office 2003. Then tried to install CS3. CS3 would go through the initialization then stop. Called Technical who pointed me to Adobe website.
Luckily came across this site.
I did a full recovery to start from scratch. Did Window's update. The UAC slider was set to to the lowest setting. Started installation of CS3. Installed with no problem.
Most likely it was the User Access Control that held it up but I am not sure since I am only moderately computer literate.
Figure I would post my experience in case anybody else has same problem.
