In CBS.log are only corruptions relate to RSAT in WinSxS,and seems only this component is corrupted in your system

.This update should be uninstalled a bit different way than other hotfixes:
this means should be:
cd /d C:\Temp
expand -f:* amd64fre_GRMRSATX_MSU.msu C:\Temp
start /w pkgmgr /m:Windows6.1-KB958830-x64.cab /up /s:C:\Sandbox
but in your case I doubt it will work in your case due to corruptions what we see
Instead to uninstall it I recommend fix this RSAT although it looks a mad idea to fix over 100 components
Try this,but before
1.In console type following commands
cd /d C:\Temp
expand -f:* amd64fre_GRMRSATX_MSU.msu C:\Temp WARNING: If you still have Windows6.1-KB958830-x64.cab in C:\Temp folder then ignore the second command and only make below command expand -f:* Windows6.1-KB958830-x64.cab C:\Temp
//sometimes you may have problem with unpacking all files (about 10000),if you will have any error with this command just repeat it again//
2.Boot Vista DVD,choose language>>repair computer>>command prompt and type:
copy C:\Temp\*.manifest C:\Windows\WinSxS\Manifests
3.Run system normally,empty
C:\Windows\Logs\CBS folder,run Readiness Tool again and attache new CheckSur.log to post