Hi and welcome back.
With Malwarebytes, always run the default quick scan, we never recommend users run full scans to find active malware.
Also, does COMODO have av? If it does you need to uninstall Avast, you can't have two avs running, it will cause conflicts.
Go to Add or Remove and uninstall the following if present:
MyWebSearch
Open HijackThis and run another scan.
Once it's completed the scan, look over the following entries I have listed, place a check in the boxes next to them as listed(some may not be present due to previous instructions): and press the 'fix' button. When you are doing it, make sure you have no browser windows open, including this one.
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL =
http://go.microsoft.com/fwlink/?LinkId=69157R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL =
http://go.microsoft.com/fwlink/?LinkId=54896R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page =
http://go.microsoft.com/fwlink/?LinkId=54896R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = about:blank
R3 - URLSearchHook: (no name) - {00A6FAF6-072E-44cf-8957-5838F569A31D} - C:\Program Files\MyWebSearch\bar\1.bin\MWSSRCAS.DLL
O2 - BHO: (no name) - {5C255C8A-E604-49b4-9D64-90988571CECB} - (no file)
O4 - HKLM\..\Run: [My Web Search Bar Search Scope Monitor] "C:\PROGRA~1\MYWEBS~1\bar\1.bin\m3SrchMn.exe" /m=2 /w /h
Reboot, run another scan with HJT and paste the log and advise of any ongoing or new problems as well as providing any info and or logs requested above.