I need help..... i was installing patch 1.10 but it was interrupted in the middle due to power failure. ..when I again try to install it the setup doesn't recognise my game version of witcher 3. ..and when i start the game it shows 1.10 version what should I do????

If the game runs fine,then why worry as the blackout didn't stop it but merely interrupted it.

Thanks for reply let's hope everything is ok..

If you received a power cut during installation, then you can be certain that your installation is now corrupt in some way or other. The only sensible solution is to uninstall the game from Control Panel, re-download the current installers and re-install the game. If you don't do this you are asking for trouble down the line; if you don't do it... see you back here when you start asking for help with glitches.