Unable to run Standard Mode Windows with EMM386 (68868)
The information in this article applies to:
- Microsoft MS-DOS operating system 5.0
- Microsoft MS-DOS operating system 5.0a
- Microsoft MS-DOS operating system 6.0
- Microsoft MS-DOS operating system 6.2
- Microsoft MS-DOS operating system 6.21
- Microsoft MS-DOS operating system 6.22
- Microsoft Windows 3.0
This article was previously published under Q68868 SYMPTOMS
When you try to run MS-DOS with Windows 3.0 in standard mode, you receive
the following error message:
Cannot run Windows in standard mode;
Check to ensure you are not running other protected-mode
software, or run in real mode.
This message occurs if you have installed EMM386.EXE and either expanded
memory or UMBs have been allocated by EMM386.EXE. This puts your computer
into protected mode, thus preventing you from running Windows in standard
mode.
MORE INFORMATION
If EMM386.EXE is installed with either the RAM or NOEMS switch to allocate
upper memory blocks (UMBs) and DOS=UMB is in the CONFIG.SYS, UMBs have been
allocated to MS-DOS.
If you have EMM386.EXE installed to provide expanded memory only and
expanded memory is not being used, Windows will turn off EMM386.EXE and run
normally. When EMM386.EXE is providing UMB support, or if expanded memory
is being used, EMM386.EXE cannot be turned off, so you are no longer able
to run Windows in standard mode.
| Modification Type: | Major | Last Reviewed: | 5/12/2003 |
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| Keywords: | KB68868 |
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