7-Zip is a file archiver with a high compression ratio. You can use 7-Zip on any computer, including a computer in a commercial organization. It’s all free. Here is an instruction to tell you how to exact Mp3 from 7-Zip.

1. Download and install 7Zip from here：

http://www.filepuma.com/search/7-Zip/#gsc.tab=0&gsc.ie=UTF8&gsc.sort=&gsc.q=7-Zip

2. Locate the 7Zip file you want to open, right-click on the file, then select “Extract” from the 7Zip submenu.

3. Click the “…” icon, then choose a folder on your computer where you want the MP3 files to extract. Click “Extract,” wait until 7Zip informs you that the process is complete.

4. Navigate to the folder where you extracted the 7Zip file. open the file folder which should be the same with the previous file’s name, play it with your default media player.

Gmail is a free, advertising-supported email service provided by Google. Users may access Gmail as secure webmail, as well as via POP3 or IMAP4 protocols. Gmail account also let you add contacts which includes name, email address and telephone number. Here is the instruction to tell you how to update your phone numbers on Gmail.

1. Click on the “Gmail” button on the upper left and click “Contacts” from the drop-down menu. Then you will see your contact book.

2. Locate the contact you want to edit and click “Contact Info.”

3. Enter the contact’s telephone number in the “Phone” field to update his information.

4. Click the right country flag button to the left of the phone number to update the country code for the number.

5. Click the “Mobile” label to change the label of the contact’s phone number.

6. Click “Add Phone” to add additional phone numbers. And you could do the above settings as I just told you.

Remote Desktop can help users to access your computer so that you can manage the computer’s settings, software and troubleshoot issues remotely. Here is the instruction to tell you how to change the display settings on a remote desktop.

 

1. Click “Start” and type “remote desktop” in the searching box. Press “Enter” to open the Remote Desktop setting window.

2. Click the “Options” button to extend the folder. Then click the “Display” tab which shows you several options. The options control your user experience to the remote computer.

3. Use the slider to choose the size of the display. Slide it right for a larger display, which means the Remote Desktop window is larger when it connects. Slide it all the way to the right to set it at a full-screen display.

4. Choose a color quality in the “Colors” section. Higher-quality color displays take up more resources on the remote computer, and it slows down the connection speed. Choose a lower quality if you have a slow network connection.

5. Click the “General” tab. Type the remote computer’s name and click “Connect.”