I have asked the team for advice about the situation and SPTD2.sys should be removable without any problem.
Since you can't remove it without loosing access to your system, it looks like something has gotten in your boot menu which needs to be removed.



Diagnostics Test

 Malware scan


Please run a threat scan with Malwarebytes*, a full scan with your AV, scan your system with Adwcleaner, Kaspersky TTDSKiller, ESET Online Scanner and SuperAntiSpyware
Note   Note
*(Uncheck trial version in the installation process)