Thumbnails not showing on Windows Explorer, windows server 2008

• Start button 
• click Run
• Enter SystemPropertiesPerformance
• Click OK
• Inside Performance Options window check the Show thumbnails instead of icons

You're done :-)

Photo Gallery Viewer on Windows Server 2008

If you are suffering lack of Photo Gallery Viewer after installing Windows Server 2008, then you need to read the following. It's easy to install this feature, and it can be easily done by installing the "Windows desktop experience" from the Server Manager -> Features -> Add Feature. This package includes the Windows Photo Gallery viewer as well.

Enable Wireless Networking on MS Windows Server 2008

Start -> All Programs -> Administrative Tools -> Server Manager

Choose Features in Service Manger and then choose the check-mark beside Wireless LAN Service and click Next. Later you need to click install and you are done. Wireless networking is now installed on your Windows Server 2008.

OBS : Bear in mind that using wireless services is not as secure as cable and therefore deactivated.

Adding up all values in a column in Excel

To add up all the values from one Excel column in one cell, we only need to do this :

• click on the cell
• Write =SUM(COLUMN:COLUMN)

E.g. in following example it is =SUM(B:B), because my numbers are in column B.