Is there any fake Windows security department?

To safeguard yourself from a fake windows security department, follow the below steps -

1. Do not turn your laptop computer on again

At this point your laptop computer has been compromised by the thief. The thief's software may already be installed and lying in wait for you to reconnect to the internet, and once it does it could automatically send him a copy of your saved passwords, banking bookmarks, email information, etc. Do not turn it on unless you are sure you have shut off the laptop's WiFi and that it cannot connect to any network, or the attack could automatically resume and finish the job of robbing you.

2. Use a different computer to immediately change all of your passwords

First, change the passwords to the web sites that have your banking or credit card information stored. Change your bank password first, then your credit card account passwords. Next, try to list all the shopping sites that have your credit card on file, such as Amazon's One-Click, PayPal, Apple's iTunes, or any other such site. Then change your passwords on social media sites, such as Facebook, Twitter, etc. You don't know if the thief got a copy of your stored passwords before you shut off your computer, so to be safe you should assume that he did.

3. Consider contacting your local police

You have been the victim of a crime. If your city is large enough, your police might be able to help you file an incident report or find assistance in dealing with this issue.

4. Decide if there is anything of value on your laptop computer that you need to save that is not backed up

The ideal case would be to not have to try to recover anything. But perhaps there are email documents, word documents, photos, personal spreadsheets of information, or other data of that nature that you need to save, and that you don't have backed up. If so, you definitely want to bring the computer to someone who understands how to safely backup any data on it that you consider valuable. This is not as easy as it sounds.

Regardless of whether or not you need to recover data, I would recommend you seek a professional's help here (any computer repair place will help you for a price.) But if you want to know what the next steps are, read on.

5. Re-install Windows from a disk.

This would be the disk that came with your machine, or came with your copy of Windows. The problem is many so-called "recovery disks" aren't very good at recovering in your situation. They may not clean up all the bad software. Whatever option you are presented with, be sure to make the selection of "Reformat and reinstall a fresh copy of Windows", "Restore my machine to factory state" or some such label. And if you are presented with a screen that says something like "Save my old data", or "Preserve my account", you need to say "no".

6. Run Windows Update

After you have installed Windows, but before you put any personal information on it, you need to connect it to a network and run Windows Update. This will download any patches that have made since your Windows disk was manufactured. This will likely take quite a while.

7. Restore your data from backups and reinstall your software

Yes, this is as ugly as it sounds. It's going to be just as much work as putting all your stuff on a fresh computer, because that's what it you need to do here to get running again.

8. Watch your bank statements

There is a chance that the attacker already has enough data to start stealing from you. Keep an eye on your bank balance and your credit card statements, and immediately report anything suspicious.