Export Settings

I've just bought a Pavillion HP Laptop , with 16Gb Ram , Intel i7 8550U processor .

I own Premiere 12 and 14 so downloaded versions of both from webpage and used my product key as I have no CD drive . (I've even downloaded a trial version of 2018 too ) .

I've used both 12 and 14 on an older , slower PC with no issues now , I cannot export in any format without "unknown error" occurring .

I'm guessing it is settings on y new laptop causing the problem ?