Even though there was one failure, let's try the install again and provide log if it fails. Since your CBS.log is getting extremely large you can delete this before the attempt so it is much smaller again.
If you are unable to delete this file manually you can use the following to delete it for you.
FRST Fix
NOTICE: This script was written specifically for this user, for use on that particular machine. Running this on another machine may cause damage to your operating system
1. Download attached file and save it to the Desktop.
Note. It's important that both files, FRST64 and fixlist.txt are in the same location or the fix will not work (in this case...the desktop).
2. Run FRST64 by Right-Clicking on the file and choosing Run as administrator.
3. Press the Fix button just once and wait. If for some reason the tool needs a restart, please make sure you let the system restart normally. After that let the tool complete its run.
4. When finished FRST64 will generate a log on the Desktop (Fixlog.txt). Please post the contents of it in your reply.