Computer loses connection to my wireless network when i update my video card driver, but works in safe mode?

Safe mode loads minimal drivers, so the new video driver is not being used. It looks like a driver conflict issue. Weird, but there it is. Do you need the new driver? You could just do without. You could also try updating the driver for the wireless adapter to see if that prevents the conflict (update from manufacturers website, not Windows built in utility). Also, I know a guy who recommends a complicated graphics card driver update method. It goes something like this: Uninstall the old driver in Device Manager. Delete the old driver files. Run CCleaner's registry cleaner. Restart. Disable anti-virus. Install new graphics drivers. Restart. Enable anti-virus if the restart did not enable it again automatically.

It's either an incompatibility between your WiFi network adapter and your new video card or your power supply in your computer is not able to handle the extra load of your new video card.

Since you provided no information about either the WiFi network adapter or the video card, that's where this answer will end.

Next time provide specifics with model numbers and manufacture names for the computer, the WiFi network adapter, and the video card.

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