Please capitalize where necessary: he received his b.a. from cambridge and remained there to study for his doctorate under shaun wylie.
A: He received his B.A. from Cambridge and remained there to study for his doctorate under Shaun Wylie.

Please capitalize where necessary: a modbus serial link rs485 is also available.
A: A MODBUS serial link RS485 is also available.

Please capitalize where necessary: before buying a vacuum cleaner philips fc 6140 specify all your options, equipment, appearance and warranty from the seller. please note that we are not engaged in the sale and manufacture warranty.
A: Before buying a vacuum cleaner Philips FC 6140 specify all your options, equipment, appearance and warranty from the seller. Please note that we are not engaged in the sale and manufacture warranty.

Please capitalize where necessary: the warning supposedly coming from prism that says "your computer has been locked" is, in fact, a serious virus infection classified as ransomware.
A:
The warning supposedly coming from PRISM that says "Your computer has been locked" is, in fact, a serious virus infection classified as ransomware.