Installing Zotero is a two-step process. Step 1 is the program itself, and Step 2 allows you to connect to browsers to add citations from the web.
STEP 1:
1. Visit http://www.zotero.com
2. Click Download
STEP 2:
3. Click the Download to the download Zotero and Connector appropriate for your OS.
4. Follow the prompts for installing on your device.
1. Visit http://www.zotero.org
2. Click Log In
3. Click Register for a free account
4. Complete the fields and verify you are not a robot.