Computer Was working, Now it's not

[wgano22]

I just built a basic computer for someone (MSI H81I, i5 4460, 1 8gb stick of hyperx ddr3 1600, 1 120gb adata ssd, 1 1tb caviar blue, Rosewill RNX-n-250 PCe) and I was able to install windows 10, but the wifi adapter was not working even after i installed the drivers. I tried to download the drivers over ethernet but it said that they were up to date. I then tried to reseat the wifi card, but when i turn the computer on now there is no signal, it turns off and on once after about 5 seconds, and i need to hold the power button down for it to turn off. I checked to see that all of the cables were still seated and I also tried the unplugging the computer and holding down the power button thing but the same problem is still happening. I wasn't able to install any other drivers before this happened.

[SageOfSpice]

Does it start without the wifi card?