paisva,
I believe it is a false alarm, however it is not made by PC-Doctor.
TSDiag2.exe is a touch screen diagnostic program provided by the touch screen manufacturer of HP systems. It is included in the HP builds for testing the Touch Screens.
Any exe file can be infected by a worm or virus so I would get a "second opinion" maybe by Malwarebytes or other free scanning tool just to be sure. I'm pretty sure though that it is a false positive.
-Fred