XPS 15 9570 无法安装独显驱动

显示“拒绝访问”。在设备管理器中查看也看不到英伟达的显卡，只有一个核显，请问该如何解决？ 更新：使用管理员身份运行报错变为“系统找不到指定路径” 更新：更新windows后报错变成“系统找不到指定的文件” 我是用的是Dell官网下载的显卡驱动 安装LOG为 

਍਍[Mon Mar 25 15:34:13 2019]	Update Package Execution Started
[Mon Mar 25 15:34:13 2019]	Original command line: "C:\Users\shini\Downloads\nVIDIA-Graphics-Driver_8FWXK_WIN_24.21.13.9793_A02.EXE" 
[Mon Mar 25 15:34:13 2019]	DUP Framework EXE Version: 3.8.1.41
[Mon Mar 25 15:34:13 2019]	DUP Release: 8FWXKA02
[Mon Mar 25 15:34:13 2019]	Initializing framework...
[Mon Mar 25 15:34:13 2019]	Data in smbios table is (hex)value = a , Chasis type (hex)value = a , System type is : Client 
[Mon Mar 25 15:34:13 2019]	logo.png
[Mon Mar 25 15:34:15 2019]	User Command: attended
[Mon Mar 25 15:34:15 2019]	DUP Capabilities Value: 41943039 (0x27FFFFF)
[Mon Mar 25 15:34:15 2019]	DUP Vendor Software Version: 24.21.13.9793
[Mon Mar 25 15:34:15 2019]	Local System/Model Compatible with this Package? Yes
[Mon Mar 25 15:34:15 2019]	Local System OS Version: 10.0.0.0
[Mon Mar 25 15:34:15 2019]	OS Compatible with this Package? Yes
[Mon Mar 25 15:34:15 2019]	Local System OS Language: ZH
[Mon Mar 25 15:34:15 2019]	Language Compatible with this Package? Unknown
[Mon Mar 25 15:34:15 2019]	Identified Behavior : attended
[Mon Mar 25 15:34:15 2019]	Extraction-miniunz path: c:\PROGRA~3\dell\drivers\2591d555-d1a4-4683-9ed7-7f4c484abe64\miniunz.exe
[Mon Mar 25 15:34:15 2019]	Extraction-arguments:  -x C:\Users\shini\DOWNLO~1\nVIDIA-Graphics-Driver_8FWXK_WIN_24.21.13.9793_A02.EXE -o -d c:\PROGRA~3\dell\drivers\2591d555-d1a4-4683-9ed7-7f4c484abe64
[Mon Mar 25 15:34:21 2019]	Extraction-GetExitCode: 0
[Mon Mar 25 15:34:21 2019]	Identified Behavior : attended
[Mon Mar 25 15:34:21 2019]	Temporary payload log file name: C:\ProgramData\dell\drivers\2591d555-d1a4-4683-9ed7-7f4c484abe64\DUPLogDir\DUPDC7C.tmp
[Mon Mar 25 15:34:21 2019]	Translated Command Line : NVMUP.exe /v "LOGFILE=\"C:\ProgramData\dell\drivers\2591d555-d1a4-4683-9ed7-7f4c484abe64\DUPLogDir\DUPDC7C.tmp\""
[Mon Mar 25 15:34:21 2019]	Path : C:\ProgramData\dell\drivers\2591d555-d1a4-4683-9ed7-7f4c484abe64
[Mon Mar 25 15:34:21 2019]	Identified Behavior : attended
[Mon Mar 25 15:34:23 2019]	Append Vendor Software Log: C:\ProgramData\dell\drivers\2591d555-d1a4-4683-9ed7-7f4c484abe64\DUPLogDir
[Mon Mar 25 15:34:23 2019]	
--- Start of Vendor Software Log ---

[Mon Mar 25 15:34:23 2019]	
--- End of Vendor Software Log ---

[Mon Mar 25 15:34:23 2019]	Vendor Software Return Code: 4294967295
[Mon Mar 25 15:34:23 2019]	(FileUtility::DeleteDirectoryTree): *** DeleteFile() has reported failure.  The error message reported by the system is:  拒绝访
[Mon Mar 25 15:34:23 2019]	(FileUtility::DeleteDirectoryTree): *** DeleteDirectoryTree() has reported failure.  The error message reported by the system is:  拒绝访
[Mon Mar 25 15:34:23 2019]	logo.png
[Mon Mar 25 15:34:23 2019]	(MUPXMLParser::GetResultName): *** Vendor Return Code is not found in Mup.xml
[Mon Mar 25 15:34:23 2019]	Name of Exit Code: 
[Mon Mar 25 15:34:23 2019]	(DupAPI::GetReturnCode): *** Unable to find DUP value for: 
[Mon Mar 25 15:34:23 2019]	Exit Code set to: 1 (0x1)
[Mon Mar 25 15:34:23 2019]	Result: FAILURE
[Mon Mar 25 15:34:24 2019]	Open file: C:\ProgramData\Dell\UpdatePackage\Log\nVIDIA-Graphics-Driver_8FWXK_WIN_24.21.13.9793_A02.txt