Troubleshooting Flashcards
“No OS Found”
make sure the OS is properly installed and that a MBR or GPT exists. use a startup repair tool to open up the recovery command prompt, and use ‘bootrec’ command to repair the drive’s boot information.
3 commands to use:
bootrec /fixmbr - use only if using BIOS
bootrec /fixboot - use only if you are using UEFI
bootrec /rebuildbcd - used to add missing Windows installations to the boot configuration database (BCD)
Can also use the diskpart command to mark the system partition as active
GUI not loading on boot or black screen instead of hello screen
could be an issue with graphics driver or the system has some kind of misconfig or corruption. boot into safe mode, uninstall current graphics driver and install latest driver. If it still doesn’t boot with the GUI, then the Windows install will need to be repaired or recovered.
black screen when trying to boot
use ‘start+ctrl_shift+b’. if you here a beep, then that means that its a graphics issue. if no beep, then the system is frozen and its a bigger issue and will have to run chkdsk or sfc command to see the issue.
System Instability
System freezing, shutting down, failing to respond, rebooting, or powering off without an error message
Usually from:
Memory
System Files
USB Devices
Windows Memory Diagnostic Tool
provides the ability to do memory diagnostics
Service is failing to run
could be that the DLL is not properly registered. Use the Registry Server (regsvr32) to register the DLL.
7 Steps for malware removal:
- Investigate and identify malware symptoms
- Quarantine the infected systems
- Disable system restore in Windows
- Remediate the infected system
- Schedule scans and run updates
- Enable system restore and create a restore point in Windows
- Educate the end-user
Where is the hosts file and what does it do?
C:\Windows\System32\drivers\etc
Redirects traffic to another domain if configured to do so
