If you're talking about a laptop with only one physical hard drive, maybe divided into partitions, then you need to get the drive cloned, not just copied, or you will lose your operating system. Any competent computer shop will do this for you (a DIY job for anyone familiar with computers) and you could take the opportunity to replace the drive with a larger one or an SSD.
The first thin to try is a repair on the disc. Using Explorer to show all the discs on your laptop, right-click on one of them and select "properties" > "tools" > "error checking" - "check now" and tick both boxes. Some discs it can do on a live system, others (like the system disc) need to be done before the next start-up. This is a completely harmless procedure - no data will be lost but anything written on a dicky part of the disc will be moved to a good section. Do that for all the discs on your system - if your problem persists it's time for a replacement whilst the data is still able to be read.