5. Diagnosing and troubleshooting

 

5.1  Recognize and interpret the meaning of common error codes and startup messages from the boot sequence, and identify steps to correct the problems.
 
  • Safe Mode
  • Incorrect DOS version
  • No operating system found
  • Error in CONFIG.SYS  line XX
  • Bad or missing Command.com
  • Himem.sys not loaded
  • Missing or corrupt Himem.sys
  • Swap file
  • A device referenced in SYSTEM.INI could not be found
 
5.2  Recognize Windows-specific printing problems and identify the procedures for correcting them. 
 
  • Print spool is stalled
  • Incorrect/incompatible driver for print
 
5.3  Recognize common problems and determine how to resolve them.
 
  • Common problems
  • General Protection Faults
  • Illegal operation
  • Invalid working directory
  • System lock up
  • Option will not function
  • Application will not start or load
  • Cannot log on to network
 
  • DOS and Windows-based utilities
  • ScanDisk
  • Device manager
  • ATTRIB.EXE
  • EXTRACT.EXE
  • Defrag.exe
  • Edit.com
  • Fdisk.exe
  • MSD.EXE
  • Mem.exe
  • SYSEDIT.EXE
 
5.4 Identify concepts relating to viruses and virus types  their danger, their symptoms, sources of viruses, how they infect, how to protect against them, and how to identify and remove them.
 
  • What they are
  • Sources
  • How to determine presence