Aspire E-15 .... According to the Acer specs the nerwork adapter is: Acer Nplify 802.11b/g/n.
Can't find "Aspire E-15" specifically on Acer's support sites so there is likely some additional alpha-numeric characters associated with the system.
If the only thing holding you up at this point is the wireless drivers then open
Device manager
Right click the problem network adapter and choose properties.
Switch to the details tab and
change the drop down arrow to hardware ids
Copy the first line in the value box to Google and search
That should provide you with some better identification as to the chipset (Atheros, Broadcom, etc.,) and perhaps then you can look to the device manufacturer for a driver solution.
EXAMPLES:
Link...