Most likely some hardware issue.
Less likely: a driver issue in the driver of the wireless USB-card (you're sure it's the latest version for Windows 10?).
What happens if connect via an Ethernet cable and download?
What happens with a totally different (other maker, other driver) wireless card?
I recently built my computer and just downloaded windows 10 from the CD. Then i began downloading applications like steam and auto CAD. Steam downloaded fine but auto CAD froze mid download i couldn't move my mouse the sound from my music cut and the keyboard wasn't responding to me pressing caps lock. I hard restarted it and everything started up so i decided to try downloading a steam game and again the same thing happened. I don't know what to do any advice is helpfully. I have already removed and reinstalled windows, I've safe started my computer, i moved my wireless USB card to another USB.
AMD FX-9590 4.7GHz 8-Core OEM/Tray Processor
Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler
Gigabyte GA-990FXA-UD3 ATX AM3+ Motherboard
Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1866 Memory
Crucial MX100 256GB 2.5" Solid State Drive
Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive
MSI GeForce GTX 970 4GB Video Card
EVGA SuperNOVA GS 550W 80+ Gold Certified Fully-Modular ATX Power Supply