Hi Darthlucky where is your new SH3 installed outside Program/Files x86
make a games folder on drive C:/ but outside of Program/Files X86 and place your downloaded SH3 Folder with all the game files into your newly created Games folder on drive C:/.
Then run the stock unmoded SH3 install and fireup a single player mission like happytime that then creates a SH3 Folder in your documents for all your career saves if all is well then mod SH3 as you see fit.
Direct x9 download link below
https://www.filehorse.com/download-directx-9/
ensure your GPU driver is up to date your new laptop may have been sat on a warehouse shelf 12 months plus
and new laptop Gpu's also have built in graphics that arn't as powerfull as the main Gpu there mainly used for just lite work to save battery life ensure that your SH3 install is running from your Gpu and not your windows graphics.