I clicked OK on the HijackThis Beta message, and then the following logfile appeared:

Logfile of Trend Micro HijackThis v2.0.5
Scan saved at 7:47:17 AM, on 1/28/2018
Platform: Windows 7 SP1 (WinNT 6.00.3505)
MSIE: Internet Explorer v11.0 (11.00.9600.17840)

FIREFOX: 58.0 (x86 en-US)
Boot mode: Normal

Running processes:
C:\Windows\system32\taskhost.exe
C:\Windows\system32\Dwm.exe
C:\Windows\Explorer.EXE
C:\Windows\System32\hkcmd.exe
C:\Program Files\AVG\AVG PC TuneUp\TuneUpUtilitiesApp32.exe
C:\Program Files\AVG\Framework\Common\avguix.exe
C:\Program Files\Spybot - Search & Destroy 2\SDTray.exe
C:\Program Files\AVG\Antivirus\AVGUI.exe
C:\Program Files\Common Files\Apple\Internet Services\iCloudServices.exe
C:\Program Files\Common Files\Apple\Internet Services\ApplePhotoStreams.exe
C:\Program Files\Common Files\Apple\Internet Services\iCloudDrive.exe
C:\Program Files\Common Files\Apple\Internet Services\iCloudPhotos.exe
C:\Program Files\Common Files\Apple\Apple Application Support\APSDaemon.exe
C:\Program Files\Malwarebytes\Anti-Malware\mbamtray.exe
C:\Program Files\Common Files\Apple\Apple Application Support\secd.exe
C:\Windows\system32\wuauclt.exe
C:\Users\Ed\Desktop\HijackThis.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Mozilla Firefox\firefox.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/p/?LinkId=255141
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://go.microsoft.com/fwlink/p/?LinkId=255141
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/p/?LinkId=255141
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: SkypeIEPluginBHO - {AE805869-2E5C-4ED4-8F7B-F1F7851A4497} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O4 - HKLM\..\Run: [HotKeysCmds] C:\Windows\system32\hkcmd.exe
O4 - HKLM\..\Run: [AvgUi] "C:\Program Files\AVG\Framework\Common\avguirnx.exe" /lps=fmw
O4 - HKLM\..\Run: [Persistence] C:\Windows\system32\igfxpers.exe
O4 - HKLM\..\Run: [IgfxTray] C:\Windows\system32\igfxtray.exe
O4 - HKLM\..\Run: [AVGUI.exe] "C:\Program Files\AVG\Antivirus\AvLaunch.exe" /gui
O4 - HKLM\..\Run: [SDTray] "C:\Program Files\Spybot - Search & Destroy 2\SDTray.exe"
O4 - HKCU\..\Run: [SpybotPostWindows10UpgradeReInstall] "C:\Program Files\Common Files\AV\Spybot - Search and Destroy\Test.exe"
O4 - HKCU\..\Run: [GarminExpressTrayApp] "C:\Program Files\Garmin\Express Tray\ExpressTray.exe"
O4 - HKCU\..\Run: [Skype] "C:\Program Files\Skype\Phone\Skype.exe" /minimized /regrun
O4 - HKCU\..\Run: [iCloudServices] "C:\Program Files\Common Files\Apple\Internet Services\iCloudServices.exe"
O4 - HKCU\..\Run: [ApplePhotoStreams] C:\Program Files\Common Files\Apple\Internet Services\ApplePhotoStreams.exe
O4 - HKCU\..\Run: [iCloudDrive] C:\Program Files\Common Files\Apple\Internet Services\iCloudDrive.exe
O4 - HKCU\..\Run: [iCloudPhotos] C:\Program Files\Common Files\Apple\Internet Services\iCloudPhotos.exe
O4 - HKUS\S-1-5-18\..\Run: [GarminExpressTrayApp] "C:\Program Files\Garmin\Express Tray\ExpressTray.exe" (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [GarminExpressTrayApp] "C:\Program Files\Garmin\Express Tray\ExpressTray.exe" (User 'Default user')
O4 - Global Startup: Adobe Gamma Loader.exe.lnk = C:\Program Files\Common Files\Adobe\Calibration\Adobe Gamma Loader.exe
O9 - Extra button: Skype Click to Call settings - {898EA8C8-E7FF-479B-8935-AEC46303B9E5} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O11 - Options group: [ACCELERATED_GRAPHICS] Accelerated graphics
O18 - Protocol: skypec2c - {91774881-D725-4E58-B298-07617B9B86A8} - C:\Program Files\Skype\Toolbars\Internet Explorer\SkypeIEPlugin.dll
O20 - Winlogon Notify: SDWinLogon - SDWinLogon.dll (file missing)
O23 - Service: Adobe Acrobat Update Service (AdobeARMservice) - Adobe Systems Incorporated - C:\Program Files\Common Files\Adobe\ARM\1.0\armsvc.exe
O23 - Service: Adobe Flash Player Update Service (AdobeFlashPlayerUpdateSvc) - Adobe Systems Incorporated - C:\Windows\system32\Macromed\Flash\FlashPlayerUpdateService.exe
O23 - Service: Andrea ADI Filters Service (AEADIFilters) - Andrea Electronics Corporation - C:\Windows\system32\AEADISRV.EXE
O23 - Service: Apple Mobile Device - Apple Inc. - C:\Program Files\Common Files\Apple\Mobile Device Support\AppleMobileDeviceService.exe
O23 - Service: AVG Antivirus - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\Antivirus\AVGSvc.exe
O23 - Service: avgbIDSAgent - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\Antivirus\aswidsagent.exe
O23 - Service: AVG Service (avgsvc) - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\Framework\Common\avgsvcx.exe
O23 - Service: Bonjour Service - Apple Inc. - C:\Program Files\Bonjour\mDNSResponder.exe
O23 - Service: Garmin Device Interaction Service - Garmin Ltd. or its subsidiaries - C:\Program Files\Garmin\Device Interaction Service\GarminService.exe
O23 - Service: ThinkPad PM Service (IBMPMSVC) - Lenovo - C:\Windows\system32\ibmpmsvc.exe
O23 - Service: iPod Service - Apple Inc. - C:\Program Files\iPod\bin\iPodService.exe
O23 - Service: Malwarebytes Service (MBAMService) - Malwarebytes - C:\Program Files\Malwarebytes\Anti-Malware\mbamservice.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: Spybot-S&D 2 Scanner Service (SDScannerService) - Safer-Networking Ltd. - C:\Program Files\Spybot - Search & Destroy 2\SDFSSvc.exe
O23 - Service: Spybot-S&D 2 Updating Service (SDUpdateService) - Safer-Networking Ltd. - C:\Program Files\Spybot - Search & Destroy 2\SDUpdSvc.exe
O23 - Service: Spybot-S&D 2 Security Center Service (SDWSCService) - Safer-Networking Ltd. - C:\Program Files\Spybot - Search & Destroy 2\SDWSCSvc.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files\Skype\Updater\Updater.exe
O23 - Service: AVG PC TuneUp Service (TuneUp.UtilitiesSvc) - AVG Technologies CZ, s.r.o. - C:\Program Files\AVG\AVG PC TuneUp\TuneUpUtilitiesService32.exe

--
End of file - 6995 bytes

I also got a long list of HilackThis results showing a couple of items checked, but there doesn't appear to be a way to Save it, so I've just left it open.

Suggestion?