Instead of searching for a download, you should delete the existing corrupted files. Windows will detect they are missing and create brand-new, healthy versions the next time it checks for updates.
These are not static DLLs; they are active databases. A file from another PC will not match your system's current update state, which can lead to further crashes. How to Properly Fix Qmgr*.dat Errors download qmgr*.dat
They act as a local database for the download queue, keeping track of which files are currently being downloaded and how much progress has been made. Instead of searching for a download, you should
If your qmgr*.dat files are missing or corrupted, you might see "runtime" errors or find that Windows Update simply won't start. Third-party sites often offer these files for download, but this is dangerous: A file from another PC will not match