Microsoft has begun rolling out its second wave of firmware updates to fix numerous glitches in its new flagship Windows 10 devices. By Liam Tung | November 3, 2015 -- 10:33 GMT (02:33 PST) Some users have complained that their Surface Books are plagued by flickering screens. Image: Microsoft New firmware updates are rolling out to the Surface Pro 4 and Surface Book on the heels of several hardware fixes Microsoft released in late October. It appears Microsoft is trying to iron out some of the issues causing concern for owners of its new Windows 10 flagship hardware, the Surface Pro 4 and Surface Book. A variety of problems emerged immediately after the first Surface Book deliveries reached buyers, ranging from random crashes to boot problems and repeat display-driver error messages. Some users complained on Microsoft's support forums that their new Surface Books were plagued by flickering screen issues after installing its first October firmware patch. Microsoft has heard those complaints and on Monday responded with its November firmware update, which appears to address some of the chief problems, with five driver updates for the Surface Book and four for the Surface Pro 4. The Surface Book and Surface Pro 4 updates include a common fix for the HD Graphics 520 driver that "addresses some display issues, including some scenarios that result in screen flickering", according to Microsoft. The update for both also contains a new audio driver to support the updated graphics driver, an updated Surface embedded controller firmware to improve overall stability, and a new Surface Pen Settings driver to support future Windows 10 features. Unique to the Surface Book is an update for the Surface system aggregator firmware aimed at improving "the keyboard and trackpad experience". As usual, Microsoft warns that not all customers will receive the update simultaneously and those who are waiting may need to manually check Windows Update later. The firmware update released by Microsoft for the two Surface devices in late October was to fix issues in the Surface's camera, display, and storage firmware drivers.