I accidentally uninstalled Atheros Client Installation 7, and now I cannot connect to the internet wirelessly.?

[Amateurscarecrow752]

So I uninstalled this program called Atheros Client Installation 7.0.

I realized that this controlled my wireless connection, and that I had made a huge mistake, so I manually connected my laptop to the internet with a cord.

After searching for a solution, it was obvious that I could either system restore or install it again. I do not want to do a system restore.

My second problem is that in order to reinstall it, I need to know which Atheros to install. There are hundreds of versions, and since I do not know my previous version I have no clue what to install. There are no clear cut Atheros models for my computer, and when I do try to download atheros from the unofficial atheros website, there is no option to install: only a useless file with information and stuff.

I did try to go to the device manager and "simply" reinstall it, but that did not work because the computer couldn;t find the driver, so I have to assume that I must reinstall this.

My computer is an Acer aspire, windows 7, 7551-7422. I'm not very good with computers, so please try to do a step by step and not assume I know where things are.
EDIT: When you give me a link to the necessary atheros, can you tell me how to install it? Once I open up the file with winrar there is no file that lets you begin downloading, nor is there a wizard or anything.
Again, I downloaded multiple atheros's that might help, but I need explanation on how to install them once theyre downloaded.

[Savy Bones]

go to system and device manager and see which wifi device you have then install it... or just keep installing them until 1 works... crazy, yeah crazy like a fox.

[Joe]

Not to sure, but this might be the type - Atheros AR5B97. This link is where you can download the driver.

[screechingsummer994]

go to another computer and download it for your make and model (Acer aspire)computer, that is the driver for you internet wireless or Ethernet access, make sure you get the 32 or 64 bit version compatible with your Operating System, you can download from Acer website for free