- ISP to Internet backbone issue
If your ISP (Internet Service Provider) has its own speed test site (e.g., Comcast ), run several tests on it. If the problem goes away, you probably have an ISP to Internet backbone issue.
- Wireless issue
Turn off wireless in your computer and connect it to the wireless router by Ethernet cable. Run several tests to the ISP speed test (if any) and to . If the problem goes away, you probably have a wireless issue; otherwise you probably have a local ISP issue.
- Try different wireless channels
Access the configuration of your wireless router, and manually switch it to channels 1, 6, and 11 (the primary non-overlapping 2.4 GHz channels), thoroughly testing performance in each case.
- Switch to 5 GHz
If you have a dual band wireless router (recommended), try connecting to 5 GHz instead of 2.4 GHz because it's usually much less crowded, although it may have less range.
- Try a different wireless adapter
and are two of the best.