When it comes to downloading and installing,
by mrmacfixit - 1/12/13 5:28 AM
In Reply to: SURPRISE!! Chrome Attached to Adobe Reader Download - by Victoria24b
make sure that you read EVERY page as you step through the installation process.
Do not just click Next, Next, Next until done.
One one of those pages, the question "Install Chrome (Recommended)" was displayed and the answer box already had a checkmark in it.
You agreed with the answer, in that you did not remove the checkmark, and so Chrome was installed.
This happens a lot, for a whole slew of software. Be aware, read each page before proceeding.