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I need to know which device is NOT working... if it is a separate device you WILL need the driver.... if it is NOT a separate device which is external to the computer you can just google that device or you should have received it with your external device.
If a device is ON the motherboard you will NEED to supply me with a lot more details. what kind of computer/motherboard. what brand and or model of computer.. and a lot more give me all the information that is on the outside of the computer. are you running windows 7 home or windows 7 professional.... SUPPLY us with the full information and we ca help you immediately.
1. The USB to Serial has a comm port number, you can change that in Control Panel>Hardware and Software >Device Manager>Click on the adapter and make sure it's not disabled and try COMM 3 or a diffrent port you might have two conflicting each other.
I use Allen-Bradley and I also have to run it as admistrative privleges.
You need to isolate the problem. You may need to connect the USB-Serial adapter into different USB port of your computer or you may want to try connecting it into different computer. If you get the same problem after using different computer, you may need a driver for it. Or it could be defective.
Seems your laptop is overheating.
When it overheats, the laptop shgutsdown as a defense mechanism, to protect important parts like processor.
Check the fans and remove all dust from them with a vacuum..
If that doen;t help, you;ll need to perofrm a deeper cleaning of the heat sink and apply a fresh heat transfer compuond at the CPU.
You mention you have your laptop since 2006.
I would say its about time for a deep clean up
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What you want is a USB hub. That will allow you to connect more than two USB devices to your computer. There are two types, USB 2.0 and USB 1.1. USB 1.1 will work for most slow speed devices, USB 2.0 is better for cameras and hard disks that have the support. You should confirm which version of USB your computer has, but you should be OK getting a USB 4-port hub, plugging that into your computer, then plugging your keyboard and mouse into the hub and using the other port for the new peripheral that you wish to install. Old PCI cards are problematic because you need the correct drivers. You also need to make sure you plug them into the proper PCI port. It sounds like the device you got from e-bay might be bad, so you shouldn't continue to use it. If you post the make / model of your computer we might be able to suggest a new PCI card that will work if you still want to add more ports to your computer.
You can check 'Drive Management' via right-clicking 'My Computer' and clicking 'Manage'.
If you can see the drive in 'Drive Management', try changing the drive letter. Sometimes, newly added external hard drives end up having the same drive letter as an existing drive. This will cause 'My Computer' to not recognize the drive. Changing the drive letter can help.