Advice on protecting and cleaning your operating system
Advice on protecting and cleaning your operating system
He plans to hand me his laptop tomorrow for a quick check and cleanup. Unfortunately, he wants to retain some of his files. My approach would be to boot into a Linux distribution from a USB drive, back up only the necessary data without risking the USB itself, then reinstall Windows. I could also run Malwarebytes to scan for threats. If you attempt to reinstall Windows, preserving the license is possible with the right steps.
Windows 10 or later? License type—OEM, boxed, or open-source? For OEM, did it come built in or added afterward? I’d prefer going with Linux over using Malwarebytes.
Did he inform you about what you wish to retain? If yes, I’d simply save those files to the USB and reinstall as instructed. However, if you consider this risky and suspect some programs might carry malware, then inform the customer that the only solution is a complete format—be transparent with them. As you mentioned, Malwarebytes is also reliable. Just disconnect from the internet, install Malwarebytes from your USB, and perform a full scan. Once done, open MSCONFIG and remove any malware that could run at startup.
Try using the AVG Rescue CD on a USB, you just boot to the USB and it will clean the system without running Windows at all. As long as they don't have something like a nasty rootkit, it should work pretty well. http://www.avg.com/us-en/avg-rescue-cd
OEM. It seems it was already installed by default, likely the operating system included with the laptop. I've tried using a Linux setup before and it helped clean up a really messy machine. I want to retain his license, so I can just enable it via KMS. He wouldn't notice, but it's not accurate.
The AVG will surpass Hirens' abilities when dealing with malware. I wouldn't suggest reinstalling Windows on someone else's computer unless specifically instructed. Software problems are usually solvable, depending on the amount of work you're willing to put in. Having worked in IT and now focusing on Network and Computer Security, I can confidently say from a professional perspective that reinstalling the OS is typically the final resort, not the initial step.
He’s insisting on Windows 10, which means I’ll have to follow that path. Besides AVG CD, consider using Combofix and Malwarebytes for malware removal. For additional protection, Malwarebytes also offers real-time scanning. Avast or AVG are solid choices for general antivirus use on his laptop.
There are methods to preserve product IDs and certificates originally set by the OEM. Once reinstalled, you can run elevated commands with the help of slmgr to automatically enable it using the certificate and product key. This applies to Windows 7, 8, and even Windows 10, which can re-activate itself based on hardware details. I won’t share specific tools or commands here, as I’m uncertain whether this counts as knowledge sharing—this thread might need closure. In a moment, I’ll send you a private message. Based on my IT experience, I’d suggest cleaning the system thoroughly: removing malware, viruses, registry issues, hosts files, and scanning with various antivirus/antivirus programs. This can be done quickly, usually in 1 to 2 hours, and then restoring from a pre-made image. I can also reinstall Windows for a flat fee, or handle data recovery and OS setup if needed. I’m prepared to provide a warranty guaranteeing a malware-free, clean device with no infections. Most users have had no complaints.