I suspect some of the minor problems I've had during installation and early use is due to the computer running XP. I was concerned if a USB unit would provide enough juice for a good signal, considering the distance to the router. However, XP rates the signal strength as "Excellent". BTW - someone had mentioned on Amazon that this unit will only work with routers capable of the "ac" communication standard. Not true. My router is an "n/g" class, and it communicates very well.
There has been a lot of newly introduced "enforced security" (https, etc) to the web since the computer was last used four years ago. Now, places I used to go are "no go". Others are okay. The Firefox browser on the machine is version 3.x.x, whereas the last XP-supported version is 52.9. I hope upgrading will solve some problems.