PC Doctor OnCall performs a series of diagnostic checks to locate file errors and problems, including all types of software errors, Registry problems, leftovers from incomplete uninstalls, and much more. The program has been updated with real-time reporting that alerts you when a new problem actually occurs, and runs on Windows XP. The free version is designed to scan and diagnose the entire registry and hard drive of the operating system and will report all errors found. After the free scan you have the option to print the list of errors out and have your local PC repair shop fix the problems for you, or order the registered version and have the problems repaired instantly with a single click of a button without ever leaving your home or office. The registered version of PC Doctor OnCall is designed to repair all the problems it finds. If our repair service is not able to fix the problems found, we will refund your order. The registered version also comes with full technical support.