The Troubleshoot Common Operating System Problems Part 1 module provides you with the instruction and Server hardware to develop your hands on skills. This module includes the following exercises:
- Manage and Rollback Registry Entries
- Create a System Image Backup
- Understand Kernel Error
Exercise 1 - Manage and Rollback Registry Entries
System administrators may inadvertently install a faulty device driver or make an unintentional change in the Windows registry (a database of hardware and software settings) which could make your computer unusable. There is a feature on Windows which will allow you to undo these unintended changes and reinstate your system back to its working configuration.
The Last Known Good Configuration is a feature in Windows Server operating system that allows you to rollback Windows to its previous working state. This feature will not resolve problems of missing files or deleted keys (folders) in the Windows registry.
Pressing F8 before you see the Windows logo lets you invoke the Advanced Options menu and gives you the option to boot Windows Server in its Last Known Good Configuration.
Please note that in this Practice Lab, you will use guest virtual machines in a Hyper-V server, because you need to view the pre-boot phase. The pre-boot phase is where you can press the appropriate keyboard shortcuts to access the Advanced Configuration before the Windows logon screen is presented to the user.
Exercise 2 - Create a System Image Backup
Windows Server operating system provides a native backup application to enable you to create system image backup. System image back up is the current system configuration of the OS saved onto a storage device. In simpler words, it is a copy of everything that is on the system hard disk. The copy can be created on any storage device, such as a hard disk, a virtual disk, a network drive, or a CD/DVD drive. In this exercise, you will manage virtual disk storage to create system backup image on a virtual machine.
In this exercise, you will create a system image backup of PLABDC01. This backup will be used to restore PLABDC01 server back to its working configuration after a system crash.
Exercise 3 - Understand Kernel Error
Kernel Error or commonly known as Blue Screen of Death (BSOD) is an error screen captured after fatal system crash occurs on a Windows computer. There are many reasons why a Windows computer crashes. BSOD can be attributed to the following: wrong or faulty device driver was unintentionally installed; mismatched memory modules were added into the server; daisy-chained SCSI devices not properly terminated and hardware incompatibilities. Kernel error may also happen if there are modifications made to Windows system files like an update on dynamic link libraries or DLLs.
BSOD may manifest itself at rare occasions even if no configuration change was made. If this happens a Windows Server will automatically restart and attempt to recover from the system crash. If BSOD becomes persistent, you will need to reinstate the server to its working configuration by restoring a recent system image backup.
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