If your pc has never been connected to the net i cannot see why you need to bother, if your pc is slow it may well be down to software conflict, PC not been defragged for a while, low on system resources, or is there some other issue...
Fujitsu Lifebook P727 laptop review
Best of the Grad Shows 2017: University of the West of England (UWE)
Best value Mac: Which is the best £1249 Mac to buy
Les meilleures GoPro 2017