Hi,
Rather than using NPE to cross check the system security, I suggest you to use Malwarebytes Antimalware free edition from www.malwarebytes.org.
Regarding the system incompactablity, you can always keep a backup of older versions of NPE and wait till this issue is solved.
XP is dead and has been issued EOL and EoS a lot ago, so just using an AV to protect unpatched os will be not much effective.
Just to tell.
Rather than using NPE to cross check the system security, I suggest you to use Malwarebytes Antimalware free edition from www.malwarebytes.org.
Regarding the system incompactablity, you can always keep a backup of older versions of NPE and wait till this issue is solved.
XP is dead and has been issued EOL and EoS a lot ago, so just using an AV to protect unpatched os will be not much effective.
Just to tell.