The author explored used and refurbished laptops for a testing lab, focusing on budget-friendly options, particularly those running Windows 10. Microsoft has ceased support for Windows 10, leaving users vulnerable to security risks compared to those using Windows 11. Many Windows 10 devices may not support an upgrade to Windows 11, making them less desirable despite their lower prices. Users are advised to consider the importance of security and check compatibility with Windows 11 before purchasing. Devices manufactured in the last five years are more likely to support the upgrade. Indicators that a computer may not support Windows 11 include being manufactured before 2019, having an older processor, running a version of Windows earlier than 10, or lacking support for Secure Boot, TPM, or UEFI. If a computer is kept offline, the operating system's importance is reduced, but this scenario is rare. The author recommends against purchasing Windows 10 devices, as refurbished Windows 11 models are only slightly more expensive and offer better security.