I just tested and even though I opted put of the additional installers I still got this.
Malwarebytes
www.malwarebytes.com
-Log Details-
Scan Date: 8/21/18
Scan Time: 1:19 PM
Log File: ba3be594-a56e-11e8-82a1-4439c43a4aa3.json
-Software Information-
Version: 3.5.1.2522
Components Version: 1.0.421
Update Package Version: 1.0.6443
License: Premium
-System Information-
OS: Windows 10 (Build 17134.228)
CPU: x64
File System: NTFS
User: I7-PC\SAPC Upgrades
-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 295534
Threats Detected: 8
Threats Quarantined: 8
Time Elapsed: 1 min, 48 sec
-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Enabled
Heuristics: Enabled
PUP: Detect
PUM: Detect
-Scan Details-
Process: 0
(No malicious items detected)
Module: 0
(No malicious items detected)
Registry Key: 3
PUP.Optional.Conduit, HKLM\SOFTWARE\MICROSOFT\INTERNET EXPLORER\SEARCHSCOPES\{0633EE93-D776-472F-A0FF-E1416B8B2E3A}, Quarantined, [218], [236865],1.0.6443
PUP.Optional.Conduit, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\INTERNET EXPLORER\SEARCHSCOPES\{0633EE93-D776-472F-A0FF-E1416B8B2E3A}, Quarantined, [218], [236865],1.0.6443
PUP.Optional.Conduit, HKU\S-1-5-21-1317512659-618308835-1040150970-1002\SOFTWARE\MICROSOFT\INTERNET EXPLORER\SEARCHSCOPES\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}, Quarantined, [218], [236865],1.0.6443
Registry Value: 2
PUP.Optional.Conduit, HKU\S-1-5-21-1317512659-618308835-1040150970-1002\SOFTWARE\MICROSOFT\INTERNET EXPLORER\SEARCHSCOPES\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}|URL, Quarantined, [218], [236865],1.0.6443
PUP.Optional.Conduit, HKU\S-1-5-21-1317512659-618308835-1040150970-1002\SOFTWARE\MICROSOFT\INTERNET EXPLORER\SEARCHSCOPES\{0633EE93-D776-472f-A0FF-E1416B8B2E3A}|TOPRESULTURL, Quarantined, [218], [236865],1.0.6443
Registry Data: 1
PUP.Optional.Conduit, HKU\S-1-5-21-1317512659-618308835-1040150970-1002\SOFTWARE\MICROSOFT\INTERNET EXPLORER\MAIN|START PAGE, Replaced, [218], [293058],1.0.6443
Data Stream: 0
(No malicious items detected)
Folder: 0
(No malicious items detected)
File: 2
PUP.Optional.Conduit, C:\USERS\SAPC UPGRADES\APPDATA\ROAMING\MOZILLA\FIREFOX\PROFILES\B1ZGDV5N.DEFAULT-1455584356703\PREFS.JS, Replaced, [218], [301520],1.0.6443
PUP.Optional.Conduit, C:\USERS\SAPC UPGRADES\APPDATA\ROAMING\MOZILLA\FIREFOX\PROFILES\B1ZGDV5N.DEFAULT-1455584356703\PREFS.JS, Replaced, [218], [303091],1.0.6443
Physical Sector: 0
(No malicious items detected)
WMI: 0
(No malicious items detected)
(end)