It's hard to give details about what exactly is happening, but heregoes: Google Chrome and Safari both consistently crash. What causes it is yet TBD, but it's not the Chrome "Waiting for cache" crash. What will essentially happen is I'll be reading an article or a page, and when I go to open a new tab/click a link/etc., it doesn't respond. Nor will any other tab or window. Usually, I will also noticed that the Mail app will say I have 0 messages, and it too will crash. Most apps will continue working (Spotify keeps playing music, etc.) until I click on them, then they too crash. In Chrome, it will begin with a series of "XXXX page has stopped responding, you can Kill or Wait" errors. Safari will begin telling me that to visit a page, it has to refresh all open tabs and windows. I've also noticed that, when leaving the MBA unattended, I'll return to find it's restarted. I've also been near the MBA when it's restarted, and noticed it gives the "Your computer restarted due to a problem. Press any key or wait for it to continue blah blah". The Problem Report indicates a kernel panic, whatever that means. And finally, I've gotten the error "The system extension "/System/Library/Extensions/prl_usb_connect.kext" was installed improperly and cannot be used. Please try reinstalling it, or contact the product's vendor for an update." multiple times recently, most recently on Nov. 29th. Any ideas or suggestions AT ALL would be greatly appreciated!