Computer Access Control Programs for Windows
by Leithauser Research

    Leithauser Research provides a variety of computer programs that allow you to control access to your computer. These help you control what programs people can run on your computer, and what Web sites they can visit. All of these programs are distributed as shareware, which means that you can try them for 30 days for free before you pay for them. Below is a list of programs.

Internet Password Lock

Internet Password Lock is a Windows  2000/XP/Vista (does not work on 95/98/Me/NT) Internet security program that locks all Internet access (Web, email, Instant Messaging, etc.). Useful in for parents to protect their children by controlling their Internet access and business to control Internet use. For more information, click here .

Web Site Zapper

    Web Site Zapper is a Windows 95/98/2000/ME/XP/Vista software program (does not work on NT) that closes Web browsers that are displaying undesirable Web sites. It can be used for several purposes: 1) Blocking your browser from being redirected to dangerous or undesirable sites, such as those infected with viruses.
2) Blocking popups
3) Access control, to allow parents, schools, and employers to prevent children, students, or employees from going to undesirable sites, such as pornography or gambling sites.
4) Controlling when people can access the Internet. Web Site Zapper has a password protected switch to turn off blocking, so you simply have Web Site Zapper block all Web sites until you are present and can turn off the blocking. Parents can use this to control how much time children spend on the Internet.
    With Web Site Zapper, you compile a list of good and bad Web site titles and/or URLs (Web addresses). You can add Web site titles and URLs to these lists manually, or have Web Site Zapper build these lists automatically in learning mode (explained in the instruction manual).
    Once you have built a list of Web sites, Web Site Zapper can either close down any site on the bad site list (Block mode), or close down any site NOT on the good site list (Allow mode). Web Site Zapper provides the same function as Web Padlock, but operates differently. It has some advantages and some disadvantages. We suggest that you try both, and see which one best suits your needs. For more information on Web Site Zapper and to download a trial copy, click here.

Clock Guard

     Clock Guard is a Windows program that prevents tampering with the computer clock. It can be used for various purposes. A few examples are:
1) Preventing files from being given falsified time/date stamps by manually resetting the system clock and then saving the file.
2) Prevent employees who are using a computer-based time clock from altering the time to allow themselves to "punch in" at a falsified time.
3) Prevent users who have time limited programs (programs that can only be used at certain times) from accessing these programs at improper times.
4) Prevent people who are paying for computer use on a time basis from resetting the clock to reduce the amount of time they pay for.
5) Prevent people who are restricted to a certain amount of computer time per day (usually children) from resetting the computer clock to give themselves more time.
     Unlike other clock control programs, Clock Guard does not require an Internet connection. It does not automatically set the computer clock to the correct time by dialing up an atomic clock somewhere. It works by preventing sudden changes in the computer clock. You can deactivate clock protection with the password you select when you install it. This allows you to set the clock if it becomes wrong. Click here for more information on Clock Guard.

Settings Lock

Settings Lock is a software program for Windows 95/98/Me/2000/XP/NT/Vista computers that allows you to password protect 13 Windows settings and functions. These settings are:

Settings Lock protects these functions by blocking the Windows programs that allow you to access them. For example, if you password protect the System Restore, Settings Lock will not allow the System Restore program to run until you deactivate the Settings Lock protection. There is a button on the Settings Lock control panel that allows you to temporarily turn off all protections, provided you know the supervisor or administrator password. You an also permanently turn of any one or more of the protections if you know the administrator password. For more information on Settings Lock, click here.

Program and Internet Rental Software

   Program and Internet Rental Software is a Windows program that allows you to easily rent or sell access to specific programs or functions (like Internet access) on your computer. Generates a list of passwords, each of which allows access a specific program for a period of time selected by you. You can also set up a list of passwords that provide unlimited time, but have Program and Internet Rental Software keep track of how much time each password is used for each program so you can bill people for their computer usage. Set up your own Internet Cafe or computer kiosk. For more information on Program and Internet Rental Software, click here.

Computer Rental Controller

     Computer Rental Controller is a Windows program that allows you to easily rent or sell computer time on your computer. It generates a list of passwords, that allows access to the computer for a period of time selected by you. It can also allow you to set up passwords that can be used repeatedly, with Computer Rental Controller keeping track of how much time each password was used for. Set up your own Internet Café or computer kiosk. For more information on Computer Rental Controller, click here.

Software Time Lock

    Allows you to block access to the Web, individual programs, or the entire computer during selected time periods for each day of the week. Also allows you to control for how long the Internet, individual programs, or the computer itself can be used in total for each day of the week. For more information, click here.

Program Sentry

    This Windows  (does not work on NT computers) computer security program that provides access control and usage management. When installed, it allows you to either create a list of blocked programs or a list of allowed programs. In the blocked programs mode, any program on the list is blocked. In the allowed program mode, any program NOT on the list is blocked. Which mode you choose to use depends on whether you have a few programs you want to block (in which case you would use the blocked program mode), or you have a few programs you want to allow people to use (in which case you would use the allowed program mode).
    In both modes, you can assign optional  passwords to the programs on the list. In blocked program mode, if no password is assigned to a program, it cannot be individually unblocked. If a password is assigned to a blocked program, it can be unblocked using the password. In the allowed program mode, if no password is assigned to the program, it is never blocked. If a password is assigned to the program, it is blocked until someone enters the password for that program. passwords are useful if several people use the computer, and you want each to be allowed to use different programs. You can give each person the passwords to the programs they are allowed to use.
    An administrator password is required to add or remove programs from the lists or change their passwords. This provides the person who installs Program Sentry with the ability to completely control the use of a computer. All blocking can be temporarily turned off using supervisor level password. This password cannot be used to add programs to (or remove programs from) the program lists.
    This program is most useful in a business setting, where the supervisor needs the ability to control who can do what on each company computer. It can also be useful in a family setting, however, to give parents control of the computer to block children from using certain programs. Click here for more information on Program Sentry.

   If you have any questions, please send email to You can also call (386) 410-6769 between the hours of 11 AM and 5 PM Eastern time.

   If you prefer to write, the address is

Leithauser Research
821 SnapDragon Drive
New Smyrna Beach, FL 32168

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