Python 3.5 install error

the error

I already have the python2.7.12,i cut out a part of the log file as follow:

[21F4:24B0][2016-09-09T11:10:57]i301: Applying execute package: crt_14.0_v6.1_x64, action: Install, path: C:\ProgramData\Package Cache\42D5BEC7DDFBD49E76467529CBC2868987BF8460\Windows6.1-KB2999226-x64.msu, arguments: '"C:\Windows\SysNative\wusa.exe" "C:\ProgramData\Package Cache\42D5BEC7DDFBD49E76467529CBC2868987BF8460\Windows6.1-KB2999226-x64.msu" /quiet /norestart'
[21F4:24B0][2016-09-09T11:10:57]e000: Error 0x80070424: Failed to open WU service.
[21F4:24B0][2016-09-09T11:10:57]e000: Error 0x80070424: Failed to ensure WU service was enabled to install MSU package.
[21F4:24B0][2016-09-09T11:10:57]e000: Error 0x80070424: Failed to execute MSU package.
[235C:0D54][2016-09-09T11:10:57]e000: Error 0x80070424: Failed to configure per-machine MSU package.
[235C:0D54][2016-09-09T11:10:57]i319: Applied execute package: crt_14.0_v6.1_x64, result: 0x80070424, restart: None
[235C:0D54][2016-09-09T11:10:57]e000: Error 0x80070424: Failed to execute MSU package.
[21F4:24B0][2016-09-09T11:10:57]i351: Removing cached package: crt_14.0_v6.1_x64, from path: C:\ProgramData\Package Cache\42D5BEC7DDFBD49E76467529CBC2868987BF8460\
[235C:0DDC][2016-09-09T11:10:57]i304: Verified existing payload: core_JustForMe at path: C:\Users\Administrator\AppData\Local\Package Cache\{EB0611B2-7F10-4D97-BCF2-DCAAB1199498}v3.5.2150.0\core.msi.
[235C:0DDC][2016-09-09T11:10:57]e000: Error 0x80070642: BA aborted verify of payload: core_JustForMe
[235C:0DDC][2016-09-09T11:10:57]e314: Failed to cache payload: core_JustForMe from working path: C:\Users\ADMINI~1\AppData\Local\Temp\{cf72a2ab-2f1d-49fd-a0d7-1065e6357e1e}\core_JustForMe, error: 0x80070642.
[21F4:20C8][2016-09-09T11:10:57]i351: Removing cached package: crt_14.0_v6.1_x64, from path: C:\ProgramData\Package Cache\42D5BEC7DDFBD49E76467529CBC2868987BF8460\
[21F4:20C8][2016-09-09T11:10:57]w353: Unable to remove cached package: crt_14.0_v6.1_x64, from path: C:\ProgramData\Package Cache\42D5BEC7DDFBD49E76467529CBC2868987BF8460\, reason: 0x80070003. Continuing...
[235C:0D54][2016-09-09T11:10:57]i372: Session end, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{cf72a2ab-2f1d-49fd-a0d7-1065e6357e1e}, resume: None, restart: None, disable resume: No
[235C:0D54][2016-09-09T11:10:57]i330: Removed bundle dependency provider: {cf72a2ab-2f1d-49fd-a0d7-1065e6357e1e}
[235C:0D54][2016-09-09T11:10:57]i352: Removing cached bundle: {cf72a2ab-2f1d-49fd-a0d7-1065e6357e1e}, from path: C:\Users\Administrator\AppData\Local\Package Cache\{cf72a2ab-2f1d-49fd-a0d7-1065e6357e1e}\
[235C:0D54][2016-09-09T11:10:57]i371: Updating session, registration key: SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{cf72a2ab-2f1d-49fd-a0d7-1065e6357e1e}, resume: None, restart initiated: No, disable resume: No
[235C:0D54][2016-09-09T11:10:57]i399: Apply complete, result: 0x80070424, restart: None, ba requested restart:  No