Umbus.sys file information
The process known as User-Mode Bus Enumerator belongs to software Microsoft Windows Operating System by Microsoft (www.microsoft.com).
Description: Umbus.sys is not essential for the Windows OS and causes relatively few problems. The umbus.sys file is located in a subfolder of C:\Windows\System32 (common is C:\Windows\System32\DriverStore\FileRepository\umbus.inf_amd64_b78a9c5b6fd62c27\ or C:\Windows\System32\DriverStore\FileRepository\umbus.inf_amd64_8ee833e5ca48d1de\).
Known file sizes on Windows 10/11/7 are 58,368 bytes (63% of all occurrences), 94,208 bytes, 90,112 bytes or 57,856 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs.
Umbus.sys is a Microsoft signed file. The program has no visible window. The umbus.sys file is not a Windows core file. The service has no detailed description.
umbus.sys appears to be a compressed file.
Therefore the technical security rating is 11% dangerous.
Recommended: Identify umbus.sys related errors
If umbus.sys is located in the C:\Windows\System32\drivers folder, the security rating is 6% dangerous. The file size is 39,936 bytes (50% of all occurrences) or 49,152 bytes.
It is a Microsoft signed file. The program has no visible window. There is no detailed description of this service.
umbus.sys appears to be a compressed file.
Important: Some malware camouflages itself as umbus.sys. Therefore, you should check the umbus.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
Best practices for resolving umbus issues
A clean and tidy computer is the key requirement for avoiding problems with umbus. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the umbus.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
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