I have Lightroom CC and I use a PC to edit my photo`s which has worked fine since I started using Lightroom CC, However some of my photos which I Export say to another file or my desktop transfer and have coloured lines across them this does not happen with them all the lines also show up in Photoshop and ruins the photo, this seems to have been a recent development so I am a bit puzzled and annoyed that my work is been ruined.
Any Ideas would be welcome..
It sounds like you have a corrupted photo. However, if you can show us an example of one of the exports to illustrate the problem, that would help confirm (or not) that this is the problem.
This is definitely a corrupted photo. The cause of the corruption is almost always a hardware malfunction somewhere. You will need to check your hardware (most likely memory, hard disk) to make sure they are working properly.
I would try restoring the photo from backups and see if the corruption goes away. If you don't have a good backup, then there's really nothing you can do, no way to fix the corruption. If the backups are also corrupted, the problem could also be the camera card or card reader.