Frequent PC crashes

Got an ASUS rig about a year and a half old. It used to crash intermittently, then just stopped for a while. Now, a few weeks ago, the crashes came back. It started while I was playing League of Legends—it used to do that too, but I thought it was fixed. Lowering the settings helped at first, making me think it was just a GPU issue, but now it crashes even on the lowest settings. Lately, it’s crashing during basic web browsing or when I'm doing nothing at all. Ran WhoCrashed yesterday; it flagged four third-party drivers as potential culprits. Tried troubleshooting via the web, but no luck. Can anyone help? Is this something I can fix at home, or am I looking at a trip to the repair shop?

Specs: ASUS running Windows 7, 32-bit. Processor is AMD A8-3850 Apa with Radeon HD Graphics 2.90 GHz, GPU is AMD Radeon HD 6670, 4 GB RAM.

Here's the WhoCrashed analysis:

21 crash dumps have been found and analyzed. Only 10 are included in this report. 4 third party drivers have been identified to be causing system crashes on your computer. It is strongly suggested that you check for updates for these drivers on their company websites. Click on the links below to search with Google for updates for these drivers:

atikmdag.sys (ATI Radeon kernel moda driver, Advanced Micro Devices, Inc.)
aswsnx.sys
hal.sys
aswmonflt.sys

Not an overheating issue. Temps are sitting around 55 Celsius.

- Check if there's a driver update for your
- Maybe try disabling Avast while you're gaming...

...to keep an eye on temps, grab HWmonitor and get it installed. Just leave it running and check the max temp once you're done playing... you need to look at both the CPU and the GPU, not just one.

Try disabling that graphics card. The APU actually has decent enough integrated graphics that should handle something like League of Legends just fine, so try running on the integrated chip alone. Honestly, whenever I see a card like that with 4GB of VRAM... back when there were massive supply chain shortages—like when a major memory plant goes offline due to some disaster or whatever—manufacturers started slapping whatever cheap, slow memory they could find onto cards just to meet demand. That’s how you ended up with those infamous "weak" cards that have huge amounts of RAM they can't even actually utilize. It's possible that shitty memory is what's messing with you, and the best way to find out is to just kill the dedicated GPU...

Maybe...

GPU drivers were updated ages ago, and there hasn't been a new release in months. Didn't even have Norton on my rig. Not sure how to check temps after a session since the whole thing just crashes mid-game.

It could also be a temperature issue with your hardware, like the CPU or GPU, or potentially a problem with your power supply since you're crashing during the loading screen.
To monitor your temperatures while you're actually playing, you can use software like PlayClaw 3 for something straightforward, or MSI Afterburner—just go into settings, hit monitoring, check the boxes for whatever stats you want to track, and then make sure to select "show in on-screen display" at the bottom.

Uninstalled Playclaw 5. Once my GPU hit 55 degrees, the whole system just tanked. Rebooted, fired up Playclaw again, and—boom—crashed within five seconds. Tried running League of Legends, same story. It stayed on the Launcher for maybe a minute before the entire system went down. I tried disabling the graphics card entirely; League wouldn't crash then, but obviously, I couldn't actually play anything without it. Turned the card back on, and now it seems fine? Played for half an hour without a single crash.
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