Most of the driver scanning software on the market is currently available to download online, and many offer a free mini scan, so that you can try out the software and see if it suits your system before you pay any money.  This is a good way to try out new software, but remember free scans will not be in depth enough to sort out any serious issues with your driver files that could be causing system errors and poor computer performance, so you will need to purchase a complete scanning package to rectify these issues.

Several leading driver scanning providers are offering free mini scans including Driver Cure, Driver Detective and Driver Robot, which can help to identify and glitches resulting from faulty drivers.  RegCure also offers a free mini scan and has the additional benefit of providing a registry cleaning service, which can further improve computer performance and reliability.