Firstly, I have the V3-571G which runs the same WiFi/BT card as yours but, I have Windows 10 and I suggest that you install windows 10 also as, you wont have this problem, secondly if you want drivers for the QUALCOMM Atheros AR5BWB222 this is the WiFi driver go to https://www.ath-drivers.eu/download-driver-for-Atheros-chipset-with-id-74-and-Windows8-64bit.html the BT is here: https://www.ath-drivers.eu/download-driver-for-Atheros-chipset-with-id-78-and-Windows8-64bit.html these are all for Windows 8 64bit. For anybody that needs Windows 10 they also have Windows 10 drivers on these same links. Also, don't forget to press "Shift>F3" or just "F3" to activate the WiFi/BT on the system after you have installed these drivers as some times they don't trigger automatically. Hope this helps.

Have you uninstalled the old driver prior to trying to install the new driver? Try that, as you have to do that. 

This is Microsoft solution "Error codes in Device Manager in Windows" below for "Code 10" and also see their page at: https://support.microsoft.com/en-us/help/310123/error-codes-in-device-manager-in-windows

Code 10 "This device cannot start. (Code 10)"

Full Error Message

"This device cannot start. Try upgrading the device drivers for this device. (Code 10)"

Cause

Typically, the device's hardware key contains a "FailReasonString" value, and the value string is displays an error message defined by the hardware manufacturer. If the hardware key does not contain a “FailReasonString” value the message above is displayed.

Recommended resolutions

Update the driver

In the device's Properties dialog box, click the Driver tab, and then click Update Driver to start the Hardware Update Wizard. Follow the instructions to update the driver.

Note You may be prompted to provide the path of the driver.  If you are asked for the driver and you do not have it, you can try to download the latest driver from the hardware vendor’s website.

If that doesn't work then try this:

Open device manager, network adapters > double click on Qualcomm Atheros....

Advanced options and then enabled the following option:

1. Dynamic MIMO Power Save: Enable

if that doesn't work, check that he WiFi/BT card (open the back panel) is plugged in correctly. If its pugged in correctly then the card must be faulty or the plug on the PCIe mini laptop must be faulty. 

This is very strange as mine works 100% and I've never ever had such a problem with them on many Aspire laptops, the Qualcomm Atheros AR5BWB222 are a really great WiFi/BT card and very reliable and rarely go wrong.