All hard drives can fail. If a hard drive fails, recovering data is unlikely and expensive. So having a back up of the important data in your computer is essential, particularly those which are irreplaceable such as family photos or work documents.
How do I backup my data?
Most common devices used for a backup are:
- External Hard Drives are great for general use. You can use them over and over again, they usually have quite a lot of space, and they are good for backing up large amounts of data. Remember that external hard drives can fail too so make sure you keep the copy on your computer.
- CD’s and DVD’s are also good mediums for backing up data, and are reasonably cheap if you just want to backup a few things like your photo collection, music and documents.
- USB Flash Drives are great ways of storing small amounts of data, like work documents, etc.
A Backup is essentially just a copy of the data you backup, so the simplest way of backing up is just copying the data and pasting it in the device you want to backup to. There is also software that will do this for you automatically. (more…)
This is because all the frames in a movie have already been created and rendered before you watch it. The function of a graphics card is to render 3D graphics and animation on the spot as it is being displayed. Think of movies as a roll of film being played and your PC is just displaying pre-rendered frames. 
Surprisingly this is not true. A Computer can actually technically run as fast as it did when you first opened the box, as long as it is treated and maintained in the correct way. Usually a computer gets slower as you continually install programs on your computer that have services that are run on Start Up. Your Computer, (like most people I know), becomes slow the more things it is asked to do at once. Also newer programs tend to be more performance hungry as they generally have more features and assume a more modern computer.