This week's hack of over 1 billion online account credentials is the worst thing ever or else nothing to worry about, but either way you should change your passwords (again). Yahoo and Google are teaming up for encrypted email in 2015. And as always we have the latest product releases and rumors from Apple, Microsoft, and others. Read on for our recap, and to get the latest reviews and features from our editors in your inbox, subscribe to our weekly newsletters.

Security

Black Hat

It's Black Hat and DefCon week in Las Vegas, which means that we're awash in hacking news. This week's main bout between security Chicken Littles ("The sky is falling!") and the "keep calm and compute on" crowd was spurred by a New York Times report on Russian hackers stealing 1.2 billion passwords. While a breach of that size is alarming, there's no evidence yet that financial data was compromised, or that anything has been done with the account info. CNET's Seth Rosenblatt says that experts at Black Hat advise "Don't panic," because the problem's not new, and there's not much you can do. We should also note that the company publicizing the problem is selling its service as a solution while withholding details of the breach, so that seems hinky.

Your best bet: Change your passwords just in case, and consider a password manager (Windows, Mac, iOS, Android) to create unique, hard-to-crack passwords that you don't have to remember. For more info, see CNET's guide to password security and Wired's. Longer term, Tim Stevens recommends killing the user name and password.

What should feel insecure?

In better news:

Microsoft

Microsoft will release an update to Windows 8.1 on Tuesday, but it's been so pared down that it's not even being called "Update 2." You'll get it as part of your regular software updates.

Tuesday's patch will also block old ActiveX controls, including certain versions of Java, to reduce vulnerabilities.

Threshold, the next version of Windows, is expected next spring and may have a public preview this fall. Mary Jo Foley reports that it will include significant interface changes that may include a Start menu, elimination of the charms bar, and support for virtual desktops.

Microsoft has issued very early warning that it will drop support for older versions of Internet Explorer (including IE 8) on January 12, 2016, to push users to IE 11.

Apple

Apple

Last week we told you about rumors of an October 14 release for the iPhone 6. Now Recode reports a September 9 event that will likely announce the phone, which may be getting a power boost.

In CNET's ongoing series on Mac OS X Yosemite features, Jason Parker looks at the Notification Center, which will now include widgets.

For older Mac apps, developers will need to update their apps' signatures or risk getting flagged by Gatekeeper in the upcoming OS X.

Wired has a tour of the new version of Safari for Yosemite.

An Apple patent seems to indicate that Siri may come to the Mac OS. Presumably for those who are having trouble finding tomato soup, chilling gazpacho, and managing other tomato-based comestibles.

How to...

Google

There's an app for that? Srsly?

Cat Facts

Once upon a time, a bored young man posted his phone number on Facebook, hoping for amusement. Instead his cousin bombed him with prank text messages about felines. Now you, too, can annoy your friends with the Cat Facts Android app.

Is dialing too much work? That's OK, you can now order a pizza with a couple keystrokes, thanks to Push for Pizza for iOS.

Has the conversation fallen, and you can't get up? This Is Your Out -- an app with a physical button, presumably like a Life Alert -- will call you to give you an excuse to escape your bad date or the yappy coworker who's cornered you. The app hasn't raised its funding yet, though, so you may have to rely on good, old-fashioned rudeness.

Julie is managing editor of Download.com and has been cooking up tech editorial since 1996.