Second, Amitabh Srivastava, head of Microsoft’s Azure cloud platform business, announced that he’s leaving the company. Srivastava, who joined Microsoft in 1997, was widely considered to be a possible successor to Muglia, but lost out to Nadella.

One of the few ever to be named a Distinguished Engineer at Microsoft–an honor now known as Technical Fellow–he was tapped, along with Brian Valentine, by then Windows chief Jim Allchin to take over the Windows engineering efforts in 2003 at a time when the operating system was being widely derided as plagued with security and other problems. Srivastava had his team draw up a map depicting how all the various pieces of the Windows source fit together. It was eight feet tall, 11 feet wide, and was described in a 2005 Wall Street Journal story as looking like a “haphazard train map with hundreds of tracks crisscrossing each other.”

Srivastava and Valentine are credited with the 2004 proposal to streamline how all those pieces functioned, a plan that would allow various features to be added or removed without disrupting the whole operating system. The idea was a partial response to the looming threat from Google, which that year had launched Gmail. The problem was their plan required throwing out a lot of legacy source code that had been in Windows for years, and starting fresh.

Srivastava’s changes included automating testing on features that had for years been done by hand. Code with too many bugs were sent to “code jail.” Over time, code flowing into what was to become Windows Vista improved.

We all know what happened with Vista–it too was widely panned. But the engineering processes put in place had a lot to do with the many improvements that appeared in Windows 7.

Srivastava then moved on to a new Microsoft project in 2006, code named Red Dog, now known as Azure, which launched in 2008. From this he pivoted to running the server and cloud division, overseeing Microsoft’s relationships with enterprise and data center customers.

People I’ve been talking to who tend to know a lot about the internal politics at Microsoft say this isn’t the last of the changes. Now that Muglia’s replacement has been announced, Nadella is going to want to name key members for his team, which means that those not tapped will probably choose to leave as well. The management shake-up at Microsoft is not over yet.

Srivastava has a Ph.D. in computer science from Penn State, and was invited to deliver the commencement address at the school’s College of Engineering in 2008, which is in the video below. Key quote: “In the end, it’s all about execution.”

One way to find the information you want is by setting up computer-generated alerts. These electronic notifications are relatively simple to use and offer a range of helpful services, from a virtual heads-up when your name is mentioned online to messages about a product’s price suddenly dropping.

For years, I’ve used Google Alerts as a way of keeping track of myself online. If my name is mentioned in a blog or if this column appears on the Web, such as on the site of a newspaper that syndicates it, a Google Alert sends me an email about it. Google Alerts can work for you to find a variety of things, such as telling you if a video of a favorite band popped up online or that a blogger posted something about last night’s episode of “Mad Men.”

In about a month, Google will begin delivering these alerts to users via feeds, as well as emails. Google (GOOG) certainly isn’t alone in the alerts arena, as Yahoo (YHOO), Microsoft (MSFT) and AOL (TWX) are also players. This week I tried two small companies that recently joined the mission to help users find the Web content using alerts.

Pinpointing Searches

I tried Alerts.com and Yotify.com, and found worthwhile features in both. While Google Alerts does a good job of finding search terms in news, blogs and videos, Alerts.com and Yotify use forms that are a cinch to fill out and let you pinpoint your searches.

Alerts.com offers to notify users via email, SMS text messages or even voice calls to a cellphone or landline. The site organizes your alerts on a personalized Web page and uses a desktop application called Elertz to tell you when an alert has generated results. I liked this site’s flexibility: It not only gave me different ways to receive notifications, but also enabled a variety of options for time-specific deliveries of alerts.

But Yotify has advantages of its own, including the ability to integrate with FriendFeed and Facebook so friends can offer their recommendations or opinions. It also lets users search for event tickets or items auctioned on eBay (EBAY). And a smart preview panel gives you an idea of the type of results your search will return before you submit the request for an alert.

Viewing Results

For now, Google Alerts and Yotify will send alert notifications only via email, though all three services will let you view your alert results online. All three are free, but SMS alerts sent to a cellphone via Alerts.com may not be, depending on your plan.

All in all, I found there were certain things each service was good at doing. For example, Alerts.com lets me know college football scores when I want them: only after the final score; at the end of each quarter and after the final score; or at the end of each quarter, after the final score and after each time a team scores points. Yotify gave me detailed options in a Craigslist search for furniture, including showing only listings with photos or just those that included the word “sofa” in a title; it will even hunt for a specific price range.

For the person who wants to spend minimal time creating basic alerts, Google Alerts will do the trick. These can be narrowed down to show results that fall into the News, Web, Blogs, Video or Groups categories, or you can perform more-blanketed searches using a Comprehensive category.

Alerts.com offers plenty of simple alerts that require only a bit of scheduling to set up. Each alert appears as a widget that can be expanded, edited or deleted with a simple click, and this page has a clean look with attractive, cohesive graphics.

I didn’t care much for Elertz, the desktop component of Alerts.com, because once installed, it notified me of new Alerts data using an irksome star that glowed red until I checked my notifications. Elertz didn’t work properly on my Windows XP machine until Alerts.com fixed a bug.

But Alerts.com’s price watch and price protection alerts are incredibly useful. Price watch looks to see if an item’s price drops into a lower price range, at which point users are notified. Price protection watches to see if products you bought are now on sale so you can get a refund. I tried both, and I’m hoping I’ll hear soon that a specific pair of Anthropologie boots is on sale.

Yotify uses the idea of virtual scouts that scour the Web for specific information. Scout findings can be condensed or expanded in one click, and results can be filtered for more specific findings or shared with friends via Facebook or FriendFeed.

Scout Work

But some scouts took too much work to set up. When I tried to set up a scout for college football scores, I didn’t see a sports category (Alerts.com had a colorful NCAA icon right on its home page). Instead, I had to choose News, then select ESPN, then NCAAF and finally enter “Penn State” in a key word box for my scout. And after all that, the scout offered results only daily or hourly via email.

I would also prefer if I could better organize my scout lists. As it was, all of my results appeared in one list: The NCAA scout was right above the scout that found Obama mentions on Huffington Post, and below that were results for YouTube’s most-watched videos. Yotify says it will add ways to more neatly arrange data in the next month or so.

On average, Yotify returned more results instantly, such as 10 instant Craigslist sofa results compared with Alerts.com’s two in the first few hours.

Overall, these sites are worth trying so you can find which alert system works best for you and stop wasting time searching the Web the old-fashioned way.

– Edited by Walter S. Mossberg

• Email us at mossbergsolution@wsj.com. Find this and other columns and videos online free at the All Things Digital Web site: http://walt.allthingsd.com