I have tried to install PC Suite on my new Win10 PC. However, as soon as I connect my Nokia 6300, the PC falls over and restarts.
I have tried the software repair option as well as uninstalling and reloading the software (twice) but the same thing happens each time.
I have no problems on my old Vista PC,
Please refer to Microsoft Answers regarding legacy Nokia phones.
There's a wealth of information in their forum, do a search like:
Please note that Nokia PC Suite and Nokia Suite is no longer officially supported by Nokia or Microsoft.