Microsoft fixed the issue of running the sandbox on Windows 10, but the processor started to get very hot

The latest cumulative update for Windows 10 (version 1903) fixes a problem with the Windows sandbox (Windows Sandbox) that arose after installing another update.

As it became known in May of this year, after installing the KB4505057 update, the Windows sandbox stopped working.

“The sandbox may stop starting and give the error ” ERROR_FILE_NOT_FOUND (0x80070002) ” on devices where the system language was changed during the installation of Windows 10 during the update”, – Microsoft explained on the support page.

The Windows Sandbox is one of the key additions to Windows 10 (version 1903) that allows running applications and searching the Web in a safe environment. It is a kind of virtual machine already loaded on Windows 10 and running as a regular application.

Running apps in isolation is essential for testing untrusted software, and Windows Sandbox is designed in such a way that every time you close it, everything is removed and its settings are returned to normal. In other words, every time you launch Windows Sandbox you find it completely clean, without any files that you previously launched in the secure environment.

Read also: Google expands bug bounty program and will pay for bugs in applications with 100 million installations

The problem with the sandbox stopping after installing KB4505057 was fixed on August 30 with the release of cumulative update KB4512941. The sandbox should now work well, regardless of the changes made during the upgrade process.

However, according to users of the Reddit forum, KB4512941 causes another problem – it creates an additional load on the central processor in some computers running Windows 10 (version 1903).

“After installing the below updates, the CPU usage is high and remains high even when the machine is idle. Restarting the machine does not fix the issue”, — repots Reddit’s user with the nick u/DefinitelyYou.

After installing the patch, the SearchUI.exe-related Cortana process starts using 40% of the CPU resources. Microsoft has not yet responded to the problem.
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About Daniel Zimmermann

Daniel Zimmermann has been writing on security and malware subjects for many years and has been working in the security industry for over 10 years. Daniel was educated at the Saarland University in Saarbrücken, Germany and currently lives in New York.

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