Please start by uninstalling both of these.
Windows Diverting Services (HKLM-x32...{A7C3D2E1-4B5F-4A6E-9C8D-1E2F3A4B5C6D}) (Version: 1.26.809.1210 - Netsoft)
Windows Update Helper (HKLM-x32...{2AC336CE-371D-4F3A-86DB-1D5EB887A1A3}) (Version: 1.0.0 - SoftNest Technologies)
Next:
- Save Fixlist.txt to your Downloads folder.
- Close any apps with unsaved work.
- Run FRST64English.exe and click "Fix".
- The computer will reboot to complete the procedure.
Please upload Fixlog.txt so I can check if any further action is needed. Also, let me know if the Yahoo search issue is resolved.