you will need to install your windows again.
or try to search for online scanning ,, these sites will scan your computer on the internet without downloading the prog , and if it doesn't work so you should install windows.
Actually, I need to choose between to things,
the first: Hp probook 450 G1 (i5 / 6 Gb ram/ amd 8750m)
The second: Lenovo Idea pad Z510( i5/ ram 6 / Nvidia 740 m)
Which is better for gaming and graphics projects?