online scan from microsoft

HI DR. I'm Greg, an installation specialist, 10 year Windows MVP, and Volunteer Guardian Moderator here to help you.

There is no online scan or Microsoft scan that's powerful enough to handle almost any infection.

Run a full scan with the most powerful on-demand free scanner Malwarebytes:

https://www.malwarebytes.com/mwb-download/.

In the Scan Settings first set it to include scanning for Rootkits.

If necessary run it in Safe Mode with Networking, or Safe Mode accessed by one of these methods: https://www.digitalcitizen.life/4-ways-boot-saf...

Clean up anything found, restart PC and then run again until it comes up clean.

If you want to keep Malwarebytes as an on-demand scanner then you can turn off its Real Time trial version in it's Settings > Account Details tab.

Check for any remainders in Settings > Apps > Apps & Features, and also in each of your browser's Extensions, Home Page settings, Search service or Add-On's as shown here: https://community.box.com/t5/How-to-Guides-for-...

Then check for damaged System Files: https://www.lifewire.com/how-to-use-sfc-scannow...

If it cannot repair them see Step 10 here to continue: http://answers.microsoft.com/en-us/windows/wiki...

Report back results. The worst infections often require wiping the hard drive of all partitions during a Clean Install which should get you past all difficulties as it has millions of others who have followed the steps in this link and never come back to report another problem: http://answers.microsoft.com/en-us/windows/wiki...

I hope this helps. Feel free to ask back any questions and keep me posted. If you will wait to choose if I solved your problem, I will keep working with you until it's resolved.

________________________________________________________

Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.

If you have Windows 10, you could use Windows Defender, there is also online scanner which is:

https://docs.microsoft.com/en-us/windows/security/threat-protection/intelligence/safety-scanner-download 

You could try Windows Defender Offline too:

https://support.microsoft.com/en-us/help/17466/windows-defender-offline-help-protect-my-pc