firefoxthebomb

have you gone to support.dell.com and entered your service tag to see if you can get the driver from them? The service tag will give you the exact model number and specs for that Dell. You can try the Windows 7 Drivers and here are the network cards for that model https://www.dell.com/support/home/en-us/product-support/product/inspiron-15r-5537/drivers

I own one of these and it too works with WinXP and above... Supports Windows XP/Vista/7/8/8.1/Linux(kernel 2.6.18-3.19.3)/Mac OS X 10.7-10.11, Compatible with 802.11b/g/n products https://www.amazon.com/TP-Link-N150-Wireless-Adapter-TL-WN725N/dp/B008IFXQFU/ref=sr_1_5?s=pc&ie=UTF8&qid=1498079781&sr=1-5&keywords=usb+wireless+network+adapter

So when you right click on the file and choose properties, the file size is empty?