Can I change com numbers on my windows  

Hi, I'm a newbie here and I've loaded a prolific programme in my computer and it can't go lower than com7, I would like to change it for lower, like com1 or 2.

Thanks, for the reply, what I need is a lower com, it works with 1 of the program but I need to go like on com 4 for an other one and I don't have any lower than 7 on my PC

Detailed system specs would help, specifically, motherboard make and model.
Also screen shots taken with the snipping tool would also help us understand the problem.

How do I get these detailed system specsand how do I screen shots taken with the snipping tool

System Info - See Your System Specs
Screenshots and Files - Upload and Post in Seven Forums

You could use either Speccy or use SevenForums Own Software to gather your system specs.

To take a screenshot either use the Snipping Tool (Start - Accessories - Snipping Tool, Snip out the System Specs and Save it. Or use Paint by pressing Print Screen on your Keyboard, go to Start - Accessories - Paint, press CTRL+V and Save it.

To upload the saved image, you can either upload to it a hosting site like imgur and type the url of the img and in front and behind are [IMG] codes.

For example
[IMG] imgur.com [/IMG]
[NOTE]There would not be any spaces between the "]" and the "i" and there would not be any spaces between the "m" and the "[".

However since this way is more complicated, I suggest you use this tutorial:
Screenshots and Files - Upload and Post in Seven Forums