I have just reinstalled windows 7 and Lightroom CC. The colours in the library & web mode are correct yet in the develop mode they are sort of negative and distorted. The colours in Photoshop are correct. Does anyone have a solution please.
This has now been resolved. I updated the graphics card driver on reinstalling Windows 7 via the Windows automatic system and this had no effect. I have now updated the graphics driver via the manufacturer and it now works as it should with crystal clear images. I hope this helps someone else.