Gateway desktop help!

[YakityYak]

Hi, So i recently bought a gateay desktop used. However when i turn it on, it boots and then once its on the actual home screen it starts to flick on and off about every two seconds and you can click or load anything, thoe mouse moves but thats about it. I am curious if this is just a problem with the hardrive and the windows 10 that is installed on this 2007 computer. Im wondering if I can change the HD to an ssd and then just lauc this computer from a OEM key version of windows I can buy online and just plug into the computer to get it started. If you guys can let me know if this is a viable option, and if not what is, that would be great 

[Wh0_Am_1]

8 minutes ago, John Love said:

 Im wondering if I can change the HD to an ssd and then just lauc this computer from a OEM key version of windows I can buy online and just plug into the computer to get it started. If you guys can let me know if this is a viable option, and if not what is, that would be great 

I don't know what the cause of the issue is, but yes you can buy an SSD for it, as long as it is smaller than the max capacity that the BIOS will allow, the question is, is it worth it?