The free upgrade from Windows 7 and 8 to Windows 10 is doing wonders: In just under a month of general availability, Windows 10 is now running on 75 million devices.

Unsurprisingly, Windows 10 appears to be doing better than Windows 8: back in 2012, only 40 million Windows 8 licences were sold in the first month of availability. After six months, Windows 8 had risen to 100 million licences sold—but "sold" is likely to be a very different figure from how many devices were actually running Windows 8.

Many had hoped Windows 10 would fix the complaints around Windows 8 and, for ailing PC vendors, spur a wave of users buying new hardware to accompany the latest OS.

Since its launch, however, complaints have risen over the way Windows 10 handles the personal data of users. Reviewers have noted numerous privacy concerns about the amount of information Windows 10 sends back to Microsoft by default.

The cumulative update is rebooting after getting part way through the installation process on x64-based systems without completing set up. The update is KB3081424.

“Downloads, reboot to install. Gets to 30% and reboots. Gets yo [sic] 59% and reboots. Gets to 59% again and then states something went wrong so uninstalling the update. Wait a few minutes and reboot. Back to login screen This happens without fail, every single time.”

It’s the second update glitch to hit Window 10: update KB3074681 came days before the big launch and crashed file explorer while there were also problems with Nvidia drivers.

Windows 10's good week saw it jump from 1.36 per cent of the market in the week commencing July 27th. The biggest loser looks to be Windows 8.1, which dipped from 16.45 per cent share to 14.93 per cent. Windows 7 went from 54.41per cent to 53.8 per cent and Windows 8 dropped from 3.6 percent to 3.46 percent.

The bug in a built-in PDF reader allowed attackers to steal sensitive files stored on the hard drives of computers that used the vulnerable Firefox version. The attack was used against both Windows and Linux users, Mozilla researcher Daniel Veditz wrote in a blog post published Thursday.

"The exploit leaves no trace it has been run on the local machine," Veditz wrote. "If you use Firefox on Windows or Linux it would be prudent to change any passwords and keys found in the above-mentioned files if you use the associated programs. People who use ad-blocking software may have been protected from this exploit depending on the software and specific filters being used."

The Windows OS project was born inside the BGU research center as a way to create a 100% unhackable operating system for military applications like missiles and airlines.

Morphisec has created a version of Windows that "randomizes all the memory" for specific Windows applications, Mimran describes.

Among beta users so far, Morphisec says it has a promising 100% success rate in stopping hackers without crying wolf with a bunch of "false positives."

Start menu shortcuts are still shortcut files placed in the same special locations as previous versions of Windows, but the Start menu app appears to be driven by a database on which some optimistic Microsoft coder has placed a limit of 512 entries.

The workaround is to use a third-party Start menu such as Stardock's Start10. Since the underlying shortcuts are intact, these solutions still work correctly.

An updated dubbed KB3074681 pushed to the current Windows 10 build for members of the Windows Insider Program is triggering crashes for some users. Rolled out on Saturday, the update causes a crash if you try to uninstall a program using Control Panel instead of using the more modern Settings screen.

The presence of a bug at this late date, especially one caused by an update, is disconcerting but not totally unexpected. Microsoft has been looking at Windows 10 as a work in progress.

One of the features that has been removed from Windows 10 -- at least for home users -- is the ability to pick and choose when updates are installed. Microsoft has taken Windows Update out of the hands of users so the process is, for the most part, completely automated.

As reported by Gordon Kelly on Forbes, there are many people complaining that updates to NVidia drivers -- which are installed without manual intervention -- are causing problems, and even killing computers.

Adobe is under tremendous pressure to do more to secure its Flash Player technology, which has been aggressively exploited in 2015.

However, the largest single source of Flash exploit discovery so far in July was not a zero-day exploit, but rather it was from Google's Project Zero security initiative. Adobe credited Google with the discovery of 20 CVEs in its APSB15-16 security bulletin. But as it turns out, Google didn't just report vulnerabilities in Flash; the company went a step further and is helping Adobe remediate the flaws and prevent them in the first place.