Mcafee has it's good and bad just like norton and every other antivirus out there.
They have done a better job of making the program less labor intensive so machines don't bog down as much as they used to. It also helps that RAM capabilities have skyrocketed over the last 7 years.
Chrome is pretty easy - Here's the download link. Having more than 1 browser won't cause problems and I'm sure that Chrome will give you the opportunity to copy over any bookmarks you might have in IE.
https://www.google.com/chrome/browser/desktop/index.html
Worldwide Antivirus Market Share
| 16.3% | | Microsoft Security Essentials |
| 13.2% | | avast! Free Antivirus |
| 6.2% | | Windows Defender |
| 5.0% | | Avira Free Antivirus |
| 4.8% | | AVG Anti-Virus Free Edition |
| 4.6% | | ESET Smart Security |
| 4.2% | | Malwarebytes Anti-Malware Pro |
| 3.3% | | AVG Internet Security |
| 3.3% | | Kaspersky Internet Security |
| 3.1% | | Norton Internet Security |
| 2.8% | | ESET NOD32 Antivirus |
| 2.7% | | COMODO Antivirus |
| 2.5% | | McAfee VirusScan |
| 2.3% | | Norton 360 |
| 2.2% | | avast! Internet Security |
| 1.9% | | Symantec Endpoint Protection |
| 21.7% | | Other |
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