Sergei Strelec is a Russian developer known for creating a widely used multiboot Windows PE (Preinstallation Environment) toolkit often referred to as “Sergei Strelec’s WinPE” or “Strelec’s PE.” His builds bundle numerous diagnostic, recovery, partitioning, and system-management utilities into bootable ISO images or USB images that technicians use to repair, image, or recover Windows systems. Strelec’s collections are valued for their comprehensiveness and convenience: a single boot medium provides antivirus scanners, password reset tools, disk imaging, partition managers, driver tools, and more.