Windows Defender not scanning

You have Trojan.BitCoinMiner

Download and run Rkill (stopping malware processes)
Run Malwarebytes again (enable rootkis this time)
Download and run ADWcleaner

Edit: add Roguekiller to the list... to check if your system is cleaned.

looking good to me

Windows defender is working now?

All this is after system restart? If so, Make the backup Image of clean system in case you get something nastier

AndreTen said:

looking good to me

Windows defender is working now?

All this is after system restart? If so, Make the backup Image of clean system in case you get something nastier

unfortunately, it hasnt changed.I still cannot access windows defender! and have tried to update using windows update but even that it broken. really screwed here.

obaidrasheed18 said:

unfortunately, it hasnt changed.I still cannot access windows defender! and have tried to update using windows update but even that it broken. really screwed here.

Start with running sfc /scannow

check if services are running:

In Run dialog box, type 'services.msc' and hit enter. search for 'Security Center'.
Right click on 'Security Center' and click on 'Restart'.

Check registry:

navigate to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options.

if there is any entry for MSASCui.exe, MpCmdRun.exe or MsMpEng.exe then right click on it and click on Delete. If you do not find any of these entry then it is normal and you don't need to do anything.

obaidrasheed18 said:

I have scanned using sfc /scannow and it is clean.

In services, I found security center but I cant access any option when right clicked (grayed out)

I was only able to find MsMpEng.exe and I have deleted it.

Guess last one was in registry.

Try 2nd part again (after restart) - services.

Edit: Do you have any other anti virus installed? Check, if there AV like McAffee, or Avast in Programs

Edit2: Was that successful? If not, I would suggest repair with in-place upgrade (mounting ISO of same version of Windows and running setup.)
tenforums tutorials |repair-install-windows-10-place-upgrade

obaidrasheed18 said:

Unfortunately nothing has worked out. This is a lenovo laptop so I am just gonna use Reset this PC option and try again. Really shocked on what has happened. It has only been a month using this laptop!

You never reported, if you have other antivirus solutions installed. In that case, you would have to use their cleaners to uninstall.

Sorry to hear that anyway. Hope reset will work.