Help needed! Blue lines are appearing on my image

[Eandoraslens]

Help! I was almost done editing a picture, when I decided to save my work and go lunch. After I restarted my computer and reopened Photoshop, blue lines had appeared on my project! This happened with two images and I can't go over them. I clicked all the layers away to check where the problem was, but it seems to have changed the 'background' layer as well.. When I try to cover it with the clone or correction tool, the line just moves to the edge of what I just did. So I can't get rid of it! 

Can you help me figure out what this is? Is it something I changed in Photoshop? Of is it my laptop? I attached a screenshot of part of the image, you can see the lines on the models arm.. 

[Mylenium · Accepted solution]

Your sample file has no such artifacts, so clearly you have issues with hardware acceleration and/ or PS' memory tile functions. check these things and update your graphics driver.

Mylenium

[Eandoraslens]

Thanks for your help! I checked and updated the hardware and drivers and now everything seems to work. Back to editing! 

[Mohammad.Harb]

The could be damaged, try coping all layers to a new document and save it from there. 

i would Also recommemd resetting preferences if that doesn't work out.