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- DOCUMENT:Q103475 04-NOV-1993 [W_NT]
- TITLE :Starting Applications with /REALTIME May Hang Windows NT
- PRODUCT :Windows NT
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:buglist3.10
-
- ----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system version 3.1
- - Microsoft Windows NT Advanced Server version 3.1
- ----------------------------------------------------------------------
-
-
- SYMPTOMS
- ========
-
- From a Command Prompt (CMD.EXE), if you start an application with
- the /REALTIME switch, Windows NT may appear to hang.
-
- CAUSE
- =====
-
- The /REALTIME switch starts an application at a higher priority level
- than normal. This gives the application more processor time to use
- during its execution. If you use this switch on applications that are
- not designed for it, Windows NT will not respond to any other commands
- and will appear to hang, even though Windows NT is actually still
- running and executing as instructed by the command line switch.
-
- RESOLUTION
- ==========
-
- To prevent this situation from occurring, it is possible for the
- Administrator of the system to set a User's rights so they are unable
- to use this feature of setting thread priorities. Power Users are
- given the right to Increase Scheduling Priorities by default.
-
- To remove the right to Increase Scheduling Priorities, use the
- following procedure:
-
- 1. Open the User Manager in the Administrative Tools group.
-
- 2. Select Policy from the menu and then select User Rights.
-
- 3. Select the Show Advanced User Rights check box.
-
- 4. Open the Rights box.
-
- 5. Select Increase Scheduling Priority.
-
- 6. Remove any desired Users or Groups from the Grant To box.
-
- Without the Increase Scheduling Priority right, users will be unable
- to use the /REALTIME switch.
-
- MORE INFORMATION
- ================
-
- Steps to Reproduce Problem
- --------------------------
-
- 1. Open a Command Prompt from the Main group.
-
- 2. Type the following command:
-
- START /REALTIME EDIT.COM
-
- 3. When Edit is opened, select the File menu.
-
- At this point, the system will not respond to any keyboard or mouse
- commands.
-
- Additional reference words: 3.10 W_NTAS hung lock freeze
- KBCategory:
- KBSubcategory: ntap
-
- =============================================================================
-
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- Copyright Microsoft Corporation 1993.