'If you pass your Unicode messages to DefWindowProcA, then you'll find that a lot of strings get truncated at their first character, explained Chen. exe name of the app using GDI+,' the Windows Insider team said.īut given the number of complaints about the G app, Microsoft has decided to offer a much more detailed explanation from Raymond Chen, a Microsoft veteran who's been working on Windows for over two decades.Īccording to Chen, G only showed up in Windows because a bug misinterpreted Unicode text as ANSI, which usually shows up as just the first character of an app. We've fixed this, so going forward, these will now have the name 'GDI+ Window ()', where will show the. 'We investigated and found an issue where windows related to GDI+ were only referenced as 'G'. GDI stands for Windows Graphics Device Interface. Instead of malware, it was caused by a quirk in how Windows handled GDI+, a graphics component originally written for Windows 98. Microsoft said it investigated user reports, found the problem and fixed the issue in 20H1. SEE: 20 pro tips to make Windows 10 work the way you want (free PDF) Microsoft in October partly explained the mysterious G app in its list of bug fixes for a Windows 10 preview build from the 20H1 branch, which is due out next year.

Some were confused after seeing G error messages, but then antivirus scans didn't turn up any malware. The mysterious G shutdown blocker has generated concerns from Windows 10 users for well over a year now.

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