Last time in my house was power outage , and after next boot i had this error in event viewer: Faulting application name: NvStreamUserAgent.exe, version: 7.1.2071.1338, time stamp: 0x5726e1d3 Faulting module name: ntdll.dll, version: 10.0.10586.306, time stamp: 0x571af2eb Exception code: 0xc0000005 Fault offset: 0x000000000002e909 Faulting process ID: 0x2eb8 Faulting application start time: 0x01d1ab42563e84e5 Faulting application path: C:\Program Files\NVIDIA Corporation\NvStreamSrv\NvStreamUserAgent.exe Faulting module path: C:\Windows\SYSTEM32\ntdll.dll Report ID: 60f4acee-7366-4535-b87a-6870b161075a Faulting package full name: Faulting package-relative application ID: I seen this error only after power outage, after booting pc in event viewer. Never more. But. I have found some topic when pc crash and op of topic , said about nvuseragenterror too. Link: Computer Crash Since 0.5.10.1 - General Error and Reporting Op from link said: "the computer completely shuts down and re-boots." "I run an I-7 3770K on an Intel MoBo. 16GM RAM, Samsung Pro 512 SSD about 1/2 full, and an Invidia GTX 560ti with latest drivers. The error recorded is: "Description Faulting Application Path: C:\Program Files\NVIDIA Corporation\NvStreamSrv\NvStreamUserAgent.exe Problem signature Problem Event Name: APPCRASH Application Name: NvStreamUserAgent.exe Application Version: 7.1.2084.9592 Application Timestamp: 57605c64 Fault Module Name: ntdll.dll Fault Module Version: 6.1.7601.23455 Fault Module Timestamp: 573a54b7 Exception Code: c0000005 Exception Offset: 000000000004d7f6 OS Version: 6.1.7601.2.1.0.768.3 Locale ID: 1033 Additional Information 1: c148 Additional Information 2: c148689fe8ae907a16bb390e0ea5ab37 Additional Information 3: c07d Additional Information 4: c07dadcb60cb1bcece589760cb6a000e"" He's computer crashed due to hardware fault, and he get the same nvuseragenterror.exe in event logs. My computer restarted due to power outage and i get the same error . Can you explain me this why nvstreamuseragent.exe ntdll was in both situations?