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RelCalc and Windows 11
Note: While this page is written to address Windows 11 (Win 11), it also applies to Windows 10 (Win 10).

The Microsoft Windows 11 operating system includes
User Account Control (UAC), a security technology that limits access to critical system resources. With UAC, when an action requiring administrative rights is requested, the user is prompted for an administrator name and password; in cases where the user is already logged in as an administrator, the user is still prompted to confirm the action.

The following notes address installing and running RelCalc V5.5 on Windows 11.

Installing RelCalc on Windows 11
- Installation Rights: The RelCalc setup installation program needs to run with administrative rights. The Win 11 UAC system typically detects installation programs and requests elevated administrative rights, so when you start the RelCalc setup program you should be prompted for permission to continue.

Note: The Win 11 UAC "Detect application installations and prompt for elevation" setting is enabled by default, but it can be turned off. If this setting is disabled, the RelCalc setup will NOT be able to properly install RelCalc. Thus, if you do not get a permission prompt when you start the RelCalc setup program, please start it again by right-clicking its icon and choosing the "Run as Administrator" menu item.

- Installation Location:
Do NOT install RelCalc under the "C:\Program Files" folder, since under the Win 11 UAC system the "C:\Program Files" folder is a protected location. We recommend installing RelCalc in the default location offered by RelCalc setup.

Running RelCalc on Windows 11
- Administrative Rights Not Required: If you follow the directions above when installing RelCalc, then you should be able to run RelCalc on Win 11 without administrative rights.

- RelCalc License File Location: The default location for the RelCalc license file is the local RelCalc program folder, which works great for most situations. But if your RelCalc Multi-User License is installed on a shared server that is accessed by multiple users via thin client software, then the license file should be located in the user specific APPDATA folder.
Note: Your RelCalc Multi-User License Delivery Package includes details on using RelCalc in a shared server setup.

- RelCalc User Settings File Location: We save various RelCalc program settings and preferences in an INI file.
This INI file is located in your user specific APPDATA folder.
This folder is RelCalc version specific and will be either:
- C:\Users\<username>\AppData\Local\RelCalc\TELC4-55
- C:\Users\<username>\AppData\Local\RelCalc\217F2-55

Note: You will typically always have full read-write access to your user specific APPDATA folder.
Note: Your user specific APPDATA folder is usually hidden by default on Windows systems.

Questions or Problems
If you have any questions or problems, please contact us.

Copyright (c) 2026 T-Cubed Systems, Inc. All rights reserved.
RelCalc (R) is a registered trademark of T-Cubed Systems, Inc.
Phone: 818-991-0057 Fax: 818-991-1281
E-mail: info@t-cubed.com Web: www.t-cubed.com