USB Attached SCSI (UAS) Driver (UASPStor) Service Defaults in Windows 10

Microsoft Uasp Driver by Microsoft Corporation.

Default Settings

Startup type: Manual
Display name:USB Attached SCSI (UAS) Driver
Service name:UASPStor
Service type:kernel
Error control:normal
Registry key:HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\UASPStor

Default Behavior

USB Attached SCSI (UAS) Driver is a kernel device driver. In Windows 10 it is starting only if the user, an application or another service starts it. If USB Attached SCSI (UAS) Driver fails to start, the failure details are being recorded into Event Log. Then Windows 10 will start up and notify the user that the UASPStor service has failed to start due to the error.

Restore Default Startup Configuration of USB Attached SCSI (UAS) Driver

1. Run the Command Prompt as an administrator.

2. Copy the command below, paste it into the command window and press ENTER:

sc config UASPStor start= demand

3. Close the command window and restart the computer.

The UASPStor service is using the uaspstor.sys file that is located in the C:\Windows\System32\drivers directory. If the file is removed or corrupted, read this article to restore its original version from Windows 10 installation media.