.SYS File Type
File extension: SYS or .sys
Description: System files
Author of the .sys file extension: Microsoft
Category: System files
Programs that use the .sys file type: Windows and DOS
Explanation of .sys file extensions:
The .sys file extension stands for system. These files are used by the operating system for storing settings and variables as well as functions that the operating system needs in order to run. For example, config.sys is the main configuration file that is used for DOS operating systems.
SYS files can usually be viewed in text editors such as Notepad. In most cases, .sys files should not be edited.
Typical problems associated with the .sys file extension:
One of the most common problems with .sys files is when someone has edited the file. By adding information to the .sys files, you are giving Windows specific instructions. Any error on your part could cause problems with the operating system.
SYS files can be edited by users however another culprit is responsible for many .sys file changes: malware. Spyware and computer viruses can make these changes as part of their programming. When this happens, the operating system will generate a variety of computer errors.
Another common .sys problem occurs when the Windows registry contains invalid instructions or has had references to .sys files removed by spyware or other processes.
Solutions/Recommendations:
Use extreme care when manually editing any .sys files. If you need to change the config.sys file, use the system configuration tool instead of a text editor. This tool will allow you to make changes to the system configuration such as reduce the number of programs that launch at startup with the least amount of risk possible.
If you must manually edit a .sys file, make a backup just in case something goes wrong.
If your computer is unstable and generating numerous errors, there’s a good chance that your computer is either infected with spyware and viruses or has a clogged Windows registry. To combat each of these problems perform a complete scan of your system using anti-spyware, anti-virus, and registry cleaning software. These three tools should help you recover your computer’s performance.
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