Interesting Facts About Bitcoin and Blockchain

Bitcoin is a cryptocurrency, but the blockchain protocol behind it can be used for a variety of non-currency purposes. people are using the blockchain to develop everything from ride-sharingservices to voting applications to cloud storage. Let’s take a closer look at how the blockchain protocol works and how it’s being used.

The most exciting thing about Bitcoin is not Bitcoin at all.People at who is hosting this have created an interesting infographic regarding Blockchain and Bitcoin in general.

blockchain

Source: securityzapwhoishostingthis

File System Check Error in FortiGate

File System Check Error in FortiGate 5.2.3 and above

In FortiOS 5.2 patch3, the file system check dialogue was introduced in the GUI and it offers the options to restart the unit and perform a file system check or, if desired, to be reminded later for performing the action in a maintenance window.

FortiGate error

File System check is a feature that is checking if the device was not shutdown properly. It will do a disk scan when the system boots up to avoid any potential file system errors.  In fact, if the unit was shut down without using the proper command (#execute shutdown), during the booting sequence, the FortiGate will check internal files for this log event and, if it cannot find it, the message will be shown.

This behavior is by design and there is no option to disable this message.

The message should no longer be seen once the following actions have been completed:

– Check of the file system.
– Reboot of the device.

source:itzecurity

How to Remove Password from PDF Files

We receive password protected bank statements, credit card statements, mobile bills and salary slips every month. It’s quite OK to have passwords for PDF files that we rarely use but the situation changes as we use the file more frequently. It can be monotonous and tiresome to type the password each time you need to open the PDF file. Even sometimes we need to share these PDF files, in such cases, we can remove the password protection from a PDF file by decrypting it. PDF decryption is very easy but requires specialized software to do that. In this tutorial, we will see how to remove password from PDF file in a distinct method. The easiest and recommended way to remove password is using the Google Chrome browser.

  1. Drag and drop password protected PDF file into Google Chrome browser.
  2. Google Chrome will now prompt you to enter the password of the file. Enter the password and hit Enter to open the file.
  3. Now go to the File menu in Google Chrome and choose Print (or press Ctrl+P on Windows or Cmd+P on Mac). Choose the destination printer as “Save as PDF” and click the Save

Google Chrome will now save the PDF to your PC but without the password protection. If you re-open this PDF , it will open without  prompting password.

source: sandeep singh, Codegena

How to enable Administrator account in Windows 8.1 & Windows 10 Home Single Language

Use the following steps to active administrator account.

  1. Open the command prompt as Administrator

Normally, the command prompt can be opened as a regular user to run commands that don’t require administrative rights. However, if you need to run a command that requires administrative rights, you must open the command prompt window as administrator.

  • The first method of accessing the command prompt as administrator is to right-click on the Start button  1  in the lower-left corner of the screen and select the Command Prompt (Admin) option from the  User menu.

You can also press the Windows key + X to access this menu.

2

–  The second method involves the Start screen. If you are currently on the Desktop, click the Start button in the lower-left corner of the screen.

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On the Start screen, start type “command prompt” (without the quotes). The Search panel displays on the right side of the screen and results of the search display as you type. Right-click on Command Prompt and select Run as administrator from the popup menu.

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So now you are opened the command prompt in administrator mode.

2. Type below given command to see the users list:

C:\WINDOWS\System32>net user

3. Unlock the administrator account.

C:\WINDOWS\System32>net user administrator /active: yes

  1. Give a password.

C:\WINDOWS\System32>net user administrator *

(* – type the password)

Source: howtogeek

 

How to: Determine Which .NET Framework Versions Are Installed

Users can install and run multiple versions of the .NET Framework on their computers. When you develop or deploy your app, you might need to know which .NET Framework versions are installed on the user’s computer.

Note that the .NET Framework consists of two main components, which are versioned separately:

  • A set of assemblies, which are collections of types and resources that provide the functionality for your apps. The .NET Framework and assemblies share the same version number.
  • The common language runtime (CLR), which manages and executes your app’s code. The CLR is identified by its own version number.

To get an accurate list of the .NET Framework versions installed on a computer, you can view the registry.

To find .NET Framework versions by viewing the registry (.NET Framework 1-4)

  1. On the Start menu, choose Run.
  2. In the Open box, enter regedit.exe.

You must have administrative credentials to run regedit.exe.

3. In the Registry Editor, open the following subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP

The installed versions are listed under the NDP subkey. The version number is stored in the Version entry. For the .NET Framework 4 the Version entry is under the Client or Full subkey (under NDP), or under both subkeys.

1 Frame work

To find .NET Framework versions by viewing the registry (.NET Framework 4.5 and later)

  1. On the Start menu, choose Run.
  2. In the Open box, enter regedit.exe.

You must have administrative credentials to run regedit.exe.

3. In the Registry Editor, open the following subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\V4\Full

Note that the path to the Full subkey includes the subkey Net Framework rather than .NET Framework.

2 Framework

Check for a DWORD value named Release. The existence of the Release DWORD indicates that the .NET Framework 4.5 or newer has been installed on that computer.

IC664979

The value of the Release DWORD indicates which version of the .NET Framework is installed.

Net Frame work

Source: Microsoft

You cannot modify the Hosts file or the Lmhosts file in Windows 7 and Windows 10

When you try to change the Hosts file or the Lmhosts file in Microsoft Windows 10, or Windows 7, you may receive an error message that resembles either of the following.

Error message 1

Access to C:\Windows\System32\drivers\etc\ hosts was denied

Error message 2

Cannot create the C:\Windows\System32\drivers\etc\hosts file.
Make sure that the path and file name are correct.

This issue occurs even though you log on by using an account that has administrative credentials.

WORKAROUND

 

To work around this issue, follow these steps:

  • Click Start 1, click All Programs, click Accessories, right-click Notepad, and then click Run as administrator.

2If you are prompted for an administrator password or for a confirmation, type the    password, or click Allow or Yes.

  • Open the Hosts file or the Lmhosts file, make the necessary changes, and then click Save on the Edit  If using Windows 7, you will need to click Save on the File menu.

source: Microsoft