@vegeta-sm As I told you in my first response, a power failure is a possibility.

If it helps as a reference, I have an MSI M-662 (Core 2 Duo Meron) and it has something similar to yours. When I have two 1Gb modules, memtest shows errors. If I test each one separately in both slots, there is no problem. That laptop went through a pretty heavy operation that involved "unsoldering" the ethernet chip because the internal network had quite a few stability issues. Since then there have been no more stability issues but shortly after the memory problem started, so I blame it on the chipset itself (maybe I scratched something I shouldn't have).

What I take from that is that this WLAN card is not working properly for whatever reason.
Run an antimalware on it in case you have a bug, if everything in the software is fine, give it a cleaning and blow out the slot, reinsert it to see if that's the problem.

I think I discovered the problem was a sound card that I had installed and in these two days no problem so far. If there is any news I will comment on it.

San Google says:

How do I get rid of WerFault EXE?
Simply follow these steps to disable werfault.exe:

Click on 'Start'.
Click on 'Control Panel'.
Click on 'Windows Error Reporting'.
Click on 'System and Maintenance'.
Click on 'Problem Reports and Solutions'.
Click on 'Change Settings' located on the left side panel of the 'Problem Reports and Solutions' window.

Salu2!

@Vegeta:

Well, I have an NVIDIA GeForce 9500GT DDR2 1GB graphics card and I want to know if it's worth upgrading to the one I'm showing in the link. I also want to know if my power supply would support it, it's a NOX 530W. It's mounted on a Gigabyte EP41-UD3L motherboard, with an Intel Dual Core 2 Duo E7500 2.93GHz processor, 4GB DDR2 RAM, and 2 hard drives plus a DVD burner. It also has 3 120mm fans. Can you tell me if with all this, the power supply can handle the graphics card I'm showing you and if it's worth it and if I'll notice any significant change?
here's the graphics card

GIGABYTE GTX750OC 2GB GDDR5 N750OC 2GI :: APPInformatica.com ::

That graphics card is much more powerful than yours, a lot more, the power supply should be fine as it easily consumes less than the one you have, I see the problem in the equipment and in the price, for that price I would choose the 2GB one
MSI GeForce GTX750 OC 2GB GDDR5 912-V809-1069 Graphics Card

now the graphics cards have gone up a bit in price, but I'm not sure if these graphics cards will run at full capacity on your platform, many games might run well, but others that require a quad-core processor might run worse, although they should run much better than with the one you have.

regards

I prefer an old laptop with 3 Gigas of Ram even if it doesn't use the D. Channel. Another thing is that you try to buy two 4 Gigas modules. I've messed around with similar laptops from friends and for office work, movies etc. they still perform well so I encourage you to try to get 2 modules of 2 Gigas, but if you can't, personally I'd rather have 3 Gigas of Ram than 2 in Dual Channel, especially if you use Windows 7-8.

it can be deleted