Quota Manager is a network administrative utility that helps to restrict the user's home disk size. The program scans user's sessions. When a new user connects, the maximimum allowed size of his home disk is determined. When the maximum allowed disk size is exceeded, writing and file creation become forbidden. To return write ability to the home disk it is necessary to delete some files from it, so that the total size of all files doesn't exceed the defined quota. The quota size can be defined separately for every global group, and some groups can use their home disk unlimitedly. Quota Manager includes the driver, service and administrative utilities that allow remote administration of Quota Manager.