TECH COMPUTER SERVICE

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Fix Windows 10 ,11 errors  Wait a few days and try again or just leave it and let it activate on its own.  The activation servers might be overwhelmed. Contact the Microsoft Activation Center for further assistance: Try the appropriate phone number listed at the  Microsoft Volume License Key assisted support telephone  information page. Reset your license status: Press Windows key + X Click Command Prompt (Admin) At the command prompt, type the following commands: slmgr.vbs -rearm Hit Enter on your keyboard Exit the command prompt Restart your computer Enter the product key using the instructions Force activation: Press Windows key + X Click Command Prompt (Admin) At the command prompt, type the following commands: slmgr.vbs -ato Hit Enter on your keyboard Exit the command prompt Restart your computer Scan for broken operating system files: You can also try running the system file checker utility to see if it might resolve any problems that might be preventing product activation. Scan

  In this article, we will learn about SAM. We will learn about the passwords and how they are stored in the SAM. We will also focus on the NTLM Authentication. At last, we will be using a bunch of different tools to extract those credentials from SAM. Table of Content Introduction to SAM How passwords are stored? LM Authentication NTLM Authentication Windows 7 PwDump7 SamDump2 Metasploit Framework Invoke-PowerDump.ps1 Get-PassHashes.ps1 PowerShell Powerdump Manual Windows 10 Mimikatz Impacket Metasploit Framework HashDump Credential_collector Load_kiwi (Mimikatz) Koadic PowerShell Empire Mimikatz/sam LaZagne CrackMapExec Decrypting Hash John The Ripper Introduction to SAM SAM is short for the Security Account Manager which manages all the user accounts and their passwords. It acts as a database. All the passwords are hashed and then stored SAM. It is the responsibility of LSA (Local Security Authority) to verify user login by matching the passwords with the da

What is a Link? A link refers to the connectivity between two devices. It includes the type of cables and protocols used for one device to be able to communicate with the other.   2) What are the layers of the OSI reference model? There are 7 OSI layers: 1) Physical Layer, 2) Data Link Layer, 3) Network Layer, 4) Transport Layer, 5) Session Layer, 6) Presentation Layer, and 7) Application Layer. 3) What is the backbone network? A backbone network is a centralized infrastructure that is designed to distribute different routes and data to various networks. It also handles the management of bandwidth and multiple channels.   4) What is a LAN? LAN network LAN stands for Local Area Network. It refers to the connection between computers and other network devices that are located within a small physical location.   5) What is a node? A node refers to a point or joint where a connection takes place. It can be a computer or device that is part of a network. Two or more nodes

  These eSIMs,   residing   on the chip of mobile devices, function similarly to physical SIM cards but boast remote reprogramming capabilities. Exploitation of eSIMs by Cybercriminals Embedded Subscriber Identity Modules (eSIMs) function similarly to physical SIM cards but are digitally stored on mobile device chips. They can be reprogrammed remotely and facilitate various functionalities such as activation and deactivation through QR code scans provided by service providers. The report also notes that F.A.C.C.T., a Russian cybersecurity firm, highlights a surge in eSIM exploitation by SIM swappers worldwide. By manipulating eSIM functionalities, criminals bypass security measures to gain control over phone numbers, leading to unauthorized access to sensitive accounts. Modus Operandi of Attackers Rather than relying on social engineering or insider assistance, attackers now exploit vulnerabilities in mobile accounts using stolen credentials. They initiate number porting to a new devic

Unless something stops working, you probably don’t think to check PC health regularly. However, through a series of simple tests and tools, you can keep an eye on your PC’s health and performance before any major issues arise. This gives you a heads-up that something might be wrong, such as early signs of a hard drive failure or devices not starting up correctly. The earlier you notice issues, the less chance you will have of permanent damage or data loss. Below you’ll find a list of procedures that you can apply on your Windows 10/11 PC to monitor your system health. 1. Use Performance Monitor “Performance Monitor” is a built-in tool in Windows that let’s you track various elements of your PC, such as networking, RAM, and disk usage. While there are a variety of things you can do with “Performance Monitor,” the two most important elements of checking PC health include the “System Diagnostics” and “System Performance” reports. These reports give you a detailed analysis of how various c

  How to run DISM commands to repair Windows BY shohrab Ansari DISM and SFC are powerful Windows commands that you can use to troubleshoot or repair system images Both Windows 11 and Windows 10 feature a built-in Deployment Image Servicing and Management tool, better known as DISM. A stable Windows build relies on a healthy foundation of core files that ensure everything runs as expected. However, sometimes Windows can develop unexpected issues over time. That's where DISM comes in as a powerful tool. DISM has long been used by system admins to configure, tweak, and even repair system images. If you learn how to use it, DISM can help you solve a wide variety of system problems. It can even sometimes help in fixing a Windows BSOD (blue screen of death). In this guide, we'll break down how this tool works and the various ways that you can use it. What is DISM? If you are interested in a more technical understanding of DISM, here's the gist of it: DISM mainly works by managing

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  PST and OST are Outlook file f ormats. PST is the format used by Outlook for backups (mailbox data that is  exported  and then  imported ). OST is the format used by Outlook to keep a local  cached  copy of the mailbox data. By default, starting from the Outlook 2010 version desktop application is able to open .pst files and create .ost which size is not more than 50 GB. If you try to open the .pst file of more than 50 GB, you will receive the followi ng error: Important:  It is not recommended to have an .ost file of more than 50GB or open a .pst file larger than 50 GB as it might cause an Outlook profile corruption. If your .ost file has reached the limit, it is recommended to decrease the size of the .ost file instead of increasing the file limits. However, you might need to do this temporarily to upload the data from the .pst file to the server and you will find instructions for this below. In order to increase the maximum size of the .pst and .ost files that your Outlook can ope