Excessive lag on battlenet

I’m getting excessive lag when playing battlenet on Starcraft (servers U.S. West). I’ve tried using other machines on my network, and there is no lag on those machines, only on my main desktop computer. I’ve tried reinstalling both the battlenet app and starcraft, as well as turning off firewall temporarily or adjusting settings in Starcraft. Any help would be greatly appreciated.

(Update) Added DxDiag resutls below:
Time of this report: 4/15/2017, 16:53:19
Machine name: CODY-PC
Operating System: Windows 7 Professional 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_ldr.160408-2045)
Language: English (Regional Setting: English)
System Manufacturer: MSI
System Model: MS-7922
BIOS: BIOS Date: 08/13/15 16:34:36 Ver: V10.6B0
Processor: Intel® Core™ i5-4460 CPU @ 3.20GHz (4 CPUs), ~3.2GHz
Memory: 8192MB RAM
Available OS Memory: 8140MB RAM
Page File: 3048MB used, 13231MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode