安装ssms出现错误

[weixin_38060280]

安装ssms时候，装到一半会失败，错误代码:0x80070643
以下是错误日志中最后面的一段：
[2718:2D6C][2017-03-31T00:34:42]i000: MainViewModel.OnPackageAction: Install Completed for package Microsoft System CLR Types for SQL Server 2016
[2718:2D6C][2017-03-31T00:34:42]i319: Applied rollback package: SQLSysClrTypes_x64, result: 0x0, restart: None
[1034:3988][2017-03-31T00:34:42]i329: Removed package dependency provider: {BCDE6B0E-6EF6-49BF-96F6-1283D3182163}, package: SQLSysClrTypes_x64
[1034:3988][2017-03-31T00:34:42]i351: Removing cached package: SQLSysClrTypes_x64, from path: C:\ProgramData\Package Cache\{BCDE6B0E-6EF6-49BF-96F6-1283D3182163}v13.0.1601.5\
[1034:3988][2017-03-31T00:34:42]i329: Removed package dependency provider: {FC4F00B2-F0DA-4E49-8424-C94C42115879}, package: SQLSysClrTypes_x86
[1034:3988][2017-03-31T00:34:42]i326: Removed dependency: {2429c17e-44f7-41eb-b2c2-21239cded34f} on package provider: {BB038FB6-AD41-4B83-BA42-615E93DB1297}, package SqlSupport_x86
[1034:3988][2017-03-31T00:34:42]i329: Removed package dependency provider: {BB038FB6-AD41-4B83-BA42-615E93DB1297}, package: SqlSupport_x86
[2718:2D6C][2017-03-31T00:34:42]i000: MainViewModel.OnPackageActionProgress: Percent completed: 100, Overall progress: 100
[1034:3988][2017-03-31T00:34:42]i330: Removed bundle dependency provider: {2429c17e-44f7-41eb-b2c2-21239cded34f}
[1034:3988][2017-03-31T00:34:42]i352: Removing cached bundle: {2429c17e-44f7-41eb-b2c2-21239cded34f}, from path: C:\ProgramData\Package Cache\{2429c17e-44f7-41eb-b2c2-21239cded34f}\
[2718:2D6C][2017-03-31T00:34:42]e000: MainViewModel.OnBundleAction: Bundle action failed: 安装时发生严重错误 (0x80070643)
[2718:2D6C][2017-03-31T00:34:42]i399: Apply complete, result: 0x80070643, restart: None, ba requested restart:  No
[2718:3AFC][2017-03-31T00:41:08]i000: MainViewModel.OpenUrl: Opening url: C:\Users\Song\AppData\Local\Temp\SsmsSetup\SSMS-Setup-CHS_20170331002210.log

操作系统为64位win10，sql server已安装。
在途中我尝试删除.net framework，重新安装。安装时候程序提示已安装更新版本的.net framework（4.6.2以上），但是我从程序列表中查看的时候是没有.net framework的，不知道是不是这里的问题？
求大神拯救！！