Computers can come with a lot of options and extras. Don't get caught paying for bells and whistles you don't need! When you go computer shopping, look for the following features to find the computer for you:
Memory: Your computer should have at least 1 gigabyte (GB) of RAM.
Processor speed: Look for a minimum of 1.6 GHz processor speed.
Size/footprint: If you're short on space, a minitower or laptop might be better.
Price: Set a budget that you're comfortable with--you can get pretty inexpensive computers that work for most folks these days.
Keyboard: Make sure the keyboard feels comfortable to you.
Monitor: Monitors come in different sizes and quality of resolution. A 15-inch monitor is comfortable for most people, but if you do work with higher-end images or watch videos, consider a larger monitor.
Input ports and drives: Computers might come with CD or DVD drives, USB ports for connecting peripherals (like printers and MP3 players) and USB sticks, and ports to connect to monitors and printers.
Wireless capability: To connect to some wireless devices and networks, you need wireless capability.
Included software: Some computers come with utility programs, such as antivirus software, or productivity software, such as Microsoft Works.
Manufacturer support: Check the warranty and technical support available.
Graphics and sound cards: If you want to use multimedia or game software, ask for more sophisticated sound and video features.
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Source:http://www.dummies.com/how-to/content/checklist-for-purchasing-a-computer.html
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