Hi, first I have to thank you to take time to help me, appreciated.
My specs are filled.
1st
I stopped and start service, all that happened was my screen blinked.
Everything is same, taksbar has no skin, "Window Color" option still do the same
2nd

I have play with other options but no effect.
3rd
"Troubleshooting couldn't identify the problem"
And yes, I have run SFC /scannow from administrator powered command line, restarted, no effect.