Did they just appear rather suddenly? If so, they aren't caused by
software. Either the video chip on your motherboard is dying and/or the
laptop's screen is failing. Since you have a laptop, you need to call
Dell tech support for repair/replacement.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.
