My computer keeps crashing after I installed a graphics card.

[Jonnyyoon]

I received an extra radeon hd 5570 from my cousin around a year ago and when I installed it with the drivers on the website it worked fine for about a month. I remember downloading a windows 8 update and then after that my computer would just start to crash and restart at random moments. it didn't matter if I was browsing or playing games it would just randomly crash and restart. I uninstalled the card, deleted all the drivers and went back to the integrated graphics and it still crashes. I've tried everything I know, I've updated all my drivers and troubleshooted countless times. Please help!

Computer specs
PSU:Corsair HX750
RAM:Crucial Ballistix DDR3 8gb x2
MB: Gigabyte z87x Ud3h
Processor: Intel core i5-4670k Haswell quad-core 3.40 GHz
SSD:Corsair Neutron 256Gb

 

[Jonnyyoon]

go to my computer; control panel; trouble shooting;hardware and sound. And everything else in trouble shooting come to that. click on everything.
Windows may notice new hardware and make adjustments.

I tried that before and I deleted a driver that it said wasn't working but it still keeps crashing

 

[Werkrat]

What other indication do you have that it's the video card? I would think it's something else if you've removed it and gone to the integrated graphics and it still crashes. Do you have anything in your event logs?

Control Panel -> Administrative Tools -> Event Viewer

Look in your Windows Logs for anything. I usually filter by critical and error

 

[Jonnyyoon]

What other indication do you have that it's the video card? I would think it's something else if you've removed it and gone to the integrated graphics and it still crashes. Do you have anything in your event logs?

Control Panel -> Administrative Tools -> Event Viewer

Look in your Windows Logs for anything. I usually filter by critical and error

I think I found the problem! it says a windows kernal power manager is the one that keeps shutting down my computer, I don't really know how to fix it though,

 

[Jonnyyoon]

Here is the event error logs

https://onedrive.live.com/redir?resid=B843BCA1700BCFC2%21343

 

[Werkrat]

It could possibly be a failing PSU. Do you have another one you could try?

Also, you need to run a registry cleaner like the one with Ccleaner.