Complaints from users began to arrive last week, when people found that they could not start Microsoft Office and other applications (1, 2, 3, 4, 5) When I tried to start, the OS showed a message saying that it could not find the necessary file, as in the example below.
As it turned out, the problem was not with the cumulative update for Windows 10, but with the update for Avast and AVG products. So, one of the components of the AVG or Avast protection solutions causes the creation of the Image File Execution Options entry in the registry for various applications, which should eventually be launched through the filter C: Program Files (x86) AVAST Software Avast Cleanup autoreactivator.exe.
A recent update broke something in this filter, and as a result, the programs simply could not start. Interestingly, this is not the first time that such an error has occurred, so, on the network, you can find similar complaintsrelated to autoreactivator.exe dated 2017.
According to the official post on the Avast forums, developers have already prepared an automatic update that solves the problem. The company's engineers also provided custom url To download this hotfix.
In addition, this bug was added to a long one. list of problemsthat occur after installing Windows 10 2004 (we already wrote that a lot of bugs were found in the release and its deployment has been suspended for now).
However, Microsoft reports that the bug also affected Windows 10 2004, Windows 10 1909, Windows 10 1903, Windows Server 2004, Windows Server 1909, as well as Windows Server 1903. Interestingly, the company’s message also mentioned the cumulative update of Windows 10 2004 KB4557959However, it is unclear whether it causes a conflict with Avast products.