This type of computer is exactly as the title states. Its a clone or a copy o fits brand-name counterpart with the exception that instead of company specific or proprietary parts, the components used to make a clone computer are from several different companies instead of one.
Lets say that you were to go to a local company that builds "clone" computers, and you tell them what you need, chances are they don't use parts that are specific to only that type of computer like the "Brand" name computer companies do.
This is a good thing because it means that they will probably use components that are interchangeable with many different brands and are easy to come by if replacement is needed.
Also, these companies that make "clone" computers are locally known and are not very reputed companies.
Advantages :
1) Cost -
Clone Computers
Compared to Brand - name computers, the clone will generally be easier on your pocket when purchasing one with similar features as its brand-name counterpart. This is most likely due to the money that is save by not offering the high end customer service. Although, that may not be the only reason for low prices.
2) Freebies - Usually these "clone" computers makers give away a package of freebies, say like a webcam and a computer table and stuff like that. While these are'nt very good quality ones, they are free. (not exactly free, cause its included as an hidden charge).
3) Replacement parts - Since the computer was built with parts that are not any one company specific, you can buy parts for the clone computer that can be used even if the brand is different from the one that was originally in the clone.
Disadvantages -
1) Warranty - Unless you purchase a service plan, you will typically not have as an attractive warranty as you would have got with a brand-name computer company.
Whatever you do, just make sure you understand how long the warranty is for and as to what kind of repairs the warranty covers before you make a purchase.
2) Customer Support - With brand-name computer companies, you are usually provided with a 24-hour toll free number that you can call if you have problems, questions or concerns about your computer.
Clones are more than likely not going to have a 24-hour help service, but rather you will be forced to only call them during regular business hours.
Also, since it is a local company, chances are they might not even have more than 1 place for you to take your computer too.
And also, they are very unreliable. They will not come as soon as you want them to come. Instead they might take a day or more from the time of call !!
Also, it is most unlikely that they will have a website to provide software updates and troubleshooting questions online. You will have to do some research as to which component the update is needed, and then, visit the respective website. Painstaking process, which most Indians with dial-up connection would'nt like to go through.
