I think you have disabled the real time protection of three antivirus otherwise I can not explain how it can work on your PC.
In this case using a single antivirus and uninstall others and use Malwarebytes, Emsisoft Emergency Kit and ADwcleaner in on-demand scan.
Ccleanner or PrivaZer are a good choice for privacy and cleaning of unnecessary files.
A backup plan is very important for the security of data and the OS: Windows Backup Tool or Paragon B & R free or Aomei OneKey free allow you to create a system image on a partition or an external HDD to be restored when needed.
I mean, I used this tools
but now I use only 360 total Security
yes Paid version , for another pc
yes LastPass installed , But on WinPhone
thank you for the reply
Hello @hero25. Thank you for sharing. It seems your thoroughness in listing your AV history while considering a change brought an innocent misunderstanding (prior to @Klipsh's post).
A free on demand scanner my family uses on our own Windows 8.1 (+ 7 SP 1) is Malwarebytes Antimalware.
Well if you are mentioning Bitdefender QuickScan, Kaspersky Security Scan and Bullguard Virus Scan then there's nothing wrong however they don't have ability to remove threats only scanning.
Alternatively on demand scanner is ESET Online Scanner or F-Secure Scanner which includes removal capabilities of threats.