Windows 10: So my OS files might've gotten corrupted by a trojan.

So this morning I've opened my pc just to notice that Windows Defender had pretty much every element from it missing on it except for the 'Security at glance' message.
It's literally impossible to run a troubleshooter,the button is missing,I tried installing it manually,it gives me an error error code 0x8007043C.
That error was also displayed when I went to windows updates.
I ran a scan with multiple anti viruses on safe mode of course one by one ,one of them found out 3 trojans in my system32 and deleted them yet the problem is still there.
I performed sfc /scannow and it didn't find anything wrong.And now I'm checking my disk with "chkdsk /X /R /offlinescanandfix c:",it didn't solve the issue.
I'm not very sure about what to do now.
My only theory is that I have a really serious trojan and I should hand it to a professional or I should re-install windows again.

:)

 

Corrupted file RAR

If the archive has been created using WinRAR, why don't you try WinRAR itself? It has a built-in repair feature for repairing corrupted archive (ZIP as well as RAR). Follow the steps given below:

• Open WinRAR application in your system.
• Now click on File tab > Open or simply press Ctrl+O.
• A small window "Find Archive" will pop up. Locate the corrupt RAR archive from your system directory and select it.
• Now click Open button.
• Click Tools tab > Repair archive or simply press Alt+R.
• Again a small window "Repairing File name.rar" will pop up.
• Now click Browse to select a location to save the repaired archive.
• Check the box "Treat the corrupt archive as RAR" and click OK.
• WinRAR will start repairing of corrupt RAR archive. Once it gets completed click Close.

I hope the above steps will help you repair the corrupted RAR archive.

Thanks.

 

Is there a trojan csrss.exe? If so how do I eliminate it.

Step one complete.
The note book has Win10 Home installed
The original OS(Ijust discovered) wasn't Win7 as I was informed. ShowKeyPlus tells me the OS was Win8.1
I wrote down the keys listed.
.
Step two is to clean and reformat one of my flash drives. I will use my pc for that.

Step three will to download the Win10 ISO file. If I'm correct, does version mean the same thing as build?
ShowKeyPlus lists version 1.0.6125 at the bottom of the window.

*Cool

 

New Trojan that Demands a Ransom

There is a new virus out there discovered by virus hunters known as "Cryzip". The Trojan encrypts your files and then demands a $300 ransom for the decryption password to get your files back. After encrypting the files, the virus leaves a nice step-by-step guide of how to go about paying the ransom off. It's supposedly spread through email Spam, and has successfully evaded anti-virus scanners.

Source: eWeek