Running a full Windows Update can ensure that all necessary system dependencies and installers are up to date. :
Last updated: October 2025 – Compatible with Windows 10, Windows 11, and Windows Server 2019/2022.
Invalid or orphaned registry entries (left over from incomplete uninstalls) can point to the wrong path or version of qccoinstaller.dll. qccoinstaller.dll
C:\Program Files (x86)\Xiaomi\MiPhone\Qualcomm\Driver\Serial\amd64\
You are most likely to encounter qccoinstaller.dll if you have installed any of the following: Running a full Windows Update can ensure that
A: No. The file is only necessary for Qualcomm hardware. If you have no such devices, its presence (or absence) won't affect your system. You can safely ignore errors if you are sure no Qualcomm drivers are installed.
If you recently deleted the file manually: You can safely ignore errors if you are
C:\Xiaomi\XiaomiFlash\Source\ThirdParty\Qualcomm\Driver\Serial\i386\ Common qccoinstaller.dll Errors