You can tell by the viruses and spyware that infect your computer
No. They can tell you what software the file was created by, or to be used by. It will not tell you which computer it was made on.
Applications software
Hardware is the equipment, everything on the computer that actually exists, everything you can see and touch. Software is the programs on the computer, it is the programming, the instructions which tell computer what to do.
get a nerd and tell him to invent it
Computer software is made of the instructions that tell the computer hardware how to do something useful that people need done. Computer hardware is the physical objects (e.g. electronic, optical, mechanical) that make up the machinery and mechanism of the computer.
Yes, there are instructions for identifying a CPU or computer chip online. You can tell by the markings or download special software that will tell you what the chip is.
If you are talking about retrieving the activation keys for your software, you may want to look at Belarc Advisor. (it's a free piece of software that will tell you pretty much everything about your computer, both hardware and software related)
Software services are available at bestbuy.com, or adobe.com. Software recommends previous knowledge, and the ability to understand computer language.
Probably your NIC or network interface card is bad on the offending computer, or you have a software issue.
System requirements are what the system (computer) needs for the software to work. These normally specify the least hardware you need for the program to work. This means that if you have a more fast computer, the software will work. Normally if you have not these requirements the software would tell you what you need to upgrade
Computer software is called either simply software, computer program or it can be called specifically by the computer software's name.
Driver Software or "Drivers" are programs that tell your computer's Operating System how to interact the hardware. Without these programs, your computer would not know how to run all of the different parts.