There are hundreds of different devices available to use with PCs, including printers, memory sticks, digital cameras, CD-ROM readers and many more, and these are made by different manufacturers and have different operating intrusions. Device drivers are a type of program that tells your computer how to operate a specific device, and all computers are built with a certain number of device drivers installed into the system. However there are so many different devices you could not install every single version onto a PC, and new versions are being created all the time, so when you buy a new device you will usually receive an installation CD (or you will need to visit the manufacturers websites for the driver download), which you can use to load the relevant driver up onto the computer to make the device compatible with your system
Even when you uninstall or update old devices from your computer, the driver can still remain in your system, and after time this means that your driver files (usually with a suffix of or EXE or DLL) can become cluttered and disorganised, making it more difficult for your operating system to find the driver it needs to run devices efficiently. This can cause a number of operating issues, from slow performance speeds to difficulty opening applications, and may even cause serious computer instability, with system crashes and possible blue screen errors.
Therefore as part of your regular computer maintenance you should run a device driver scan, which is a cleaning program that will scan your driver files and identify any out of date, corrupted, duplicate or unused drivers and clear them from your system. You can get a free basic driver scan from websites such as Driver Cure, Driver Detective and Driver Robot, and these also offer a more in depth driving scanning software for those people who are having serious problems with their driver device registry.