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Advanced Troubleshooting Techniques

Advanced Troubleshooting Techniques. Chris Conlon- Fall 2002. Macintosh. Have your system CD Dump Prefs. Windows. 2 Easy Steps Reformat Reinstall. Overview of Topics. Troubled beginnings- when computers don’t start Lost but not forgotten- Data Recovery

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Advanced Troubleshooting Techniques

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  1. Advanced Troubleshooting Techniques Chris Conlon- Fall 2002

  2. Macintosh • Have your system CD • Dump Prefs

  3. Windows • 2 Easy Steps • Reformat • Reinstall

  4. Overview of Topics • Troubled beginnings- when computers don’t start • Lost but not forgotten- Data Recovery • Your friend and mine- the Registry Editor • How to succeed as a UA without really trying- Automating Tasks

  5. Troubled Beginnings Fixing Startup Errors

  6. If you can’t get to Windows • Safe Mode- F8 • Boot off of the CD • Recovery Console (2k/XP) vs Repair Option • Security Policy Setting –otherwise you’re locked out • BIOS • Delete, F1, F2 • Escape first to disable silent boot • Quick boot is the enemy • Resetting the NVRAM/PnP data • Boot Sector virus protection vs OS reinstall • Check Beep Codes – RAM or Video Card? • Doc Memory on Tools CD—RAM testing

  7. Basics- Tools of the Trade • MSConfig • Best method-easily repaired • Startup Group and Run and Run- key • Services in NT/2000/XP • .INI Files

  8. Basics- Tools of the Trade • Sysedit • Can edit old startup files • Autoexec.bat, Config.sys, System.ini, win.ini • Good for Multimedia drivers, and old things • That pesky Norton Uninstall (navapw32.dll is missing…)

  9. Startup CPL • Installed as control panel utility • Similar to MSConfig • Easy to use

  10. Analyzing the Boot Log • Use the BLA on the Tools CD • Reads the Bootlog.txt file generated by Windows and “decodes” it. • Maybe it’s useful to you…

  11. That Pesky Driver Windows installs the same bad driver over and over…. • Finding the hidden folder • C:\windows\inf\cat • Deleting the .inf file • Only works for unsigned drivers not shipped on windows CD • Delete from device manager • Always try to “Update Driver” not “Reinstall Driver”

  12. Escaping DLL-Hell • DLL Show Utility on PC CDs

  13. When all else fails…the BIOS • Entering the BIOS • Seek and Destroy! • Eliminate Quick Boot • Turn off Power Saving • Resetting PnP Data • Disabling un-needed peripherals • IR, COM, Parallel, integrated • Low-Level Format

  14. Showing Hidden Devices • Use the registry file on tools CD to show hidden devices in device manager • What’s a hidden device you ask? • Unplugged PC Cards or USB devices, etc. • “Ghosting” network adapters

  15. Lost but not forgotten… Data Recovery…

  16. Spying on Yourself Security Tools

  17. Port Scanning • Port Scanning yourself is a good way to look for trojans • Superficial – netstat /a • Listening • Established • Port #’s

  18. Active Port • Does not seem to work well with 2k/XP • Basic Port Scanning for older systems • Reasonable at looking for Trojans

  19. SpyWorks or SpyWare? • Very Robust suite of something • Port Scanning • Intrustion Detection Tools • Intrusion Defense Tools • Key loggers and other sketchiness

  20. Hard Disk Troubles • Using Norton 2002 • Disk Doctor (FAT32 Preferred) • Repairs errors • Limitations under NTFS • Scandisk v. chkdsk /f • fdisk, format (boot disk) • Lose all data and start over (6mo) • FAT32 v. NTFS • Fdisk /mbr (when switching OS’s) • DelPart.exe – Win 9x over NT/2K • Low level format

  21. Scandisk and Chkdsk /f • Scandisk fixes simple errors on floppies and HD’s (First Line of Defense) • Doesn’t fix things very well • Chkdsk /f • Scorched Earth data recovery • Makes a mess- last resort

  22. Norton UnErase • 2 Ways for HD’s • Recycle Bin Protection • Boot off the CD – works very well • Can recover DELETED files quickly and VERY effectively • Use NDD to recover Damaged files first

  23. Floppy Recovery • Same Basics, scandisk, chkdsk /f, ndd • Can also use hex editor to grab TEXT ONLY from files. • Slow and Tedious • Use searching • Winhex on Tools CD

  24. How to succeed as a UA without really trying… Automating Tasks (or borrowing)

  25. Network Enema • New for Fall 2002 • Safer on Windows XP • Less filling same great taste

  26. The Big Finale… This year’s new tool!!!

  27. Which would you rather have? • Netconfig.exe • Instantly enables DHCP • Removes Proxy Settings • Configures for LAN • Removes DNS entries • Removes Static IP • Releases and Renews • No reboot –runs in 10s

  28. Additional Resources • AdvTeam webpage • Chris’ webpage (http://fas/~cconlon) IE only! • www.driverguide.com (drivers:all) • www.regedit.com

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