Network / Sharing :: Intermittent Internet Connectivity / Varying Error Messages

For about a week now, my computer has had intermittent internet access. It'll work anywhere from about 10 seconds to 45 minutes or so before cutting out. When it disconnects, it usually corrects itself within the next minute or so, or disconnecting/reconnecting to the network, running the troubleshooter, or turning on/off wifi will correct the issue slightly quicker.

When running the troubleshooter, I've seen about every error it has. Usually "Default gateway is unavailable." Sometimes an IP error, sometimes "network cable is unplugged," sometimes it'll tell me I have a router or modem error, or to contact my ISP. It varies. I've seen up to 3 errors at once, and then the next time the Troubleshooter runs it'll give me another entirely. The network itself is fine. A number of other devices function consistently throughout the day as my PC has issues. This PC worked on this current network for about 3 weeks prior to failing.

Normally, it thinks it's connected. Sometimes it shows the yellow symbol in the bar and says no internet access. Usually depends on how long it cuts out for.

On an HP Touchscreen laptop
AMD A10-5745M APU processor
Windows 8.1, 64 bit
Qualcomm Atheros AR9485 802.11b/g/n WiFi Adapter
Security on the wireless network is WPA2-Personal with AES encryption

I've checked for viruses (none), refreshed the PC (not a full restore, but the one that does not remove files, just programs and settings), done a couple things in command prompt, and updated the driver.