AlerteGPS_G520 isn't compatible with this version of Windows. windows7 acer aspire 5552-7474.

You need to update the software or driver for your alertegps by going to http://www.alertegps.com.au/gps_details.asp?carac=4&prod=G520  under the orange tab is one called downloads, mouse over that and select update software. You can also attempt to fix the thing via your start menu search bar by typing in drivers and selecting device manager or driver update. Double click the hardware from the list and then select the driver tab in the new window that opens up. Select update driver and see if that worked. It is not the computer or the operating system's responsibility to keep these things compatible but that of the manufacturer.