Sergei Strelec's WinPE creates a bootable DVD or thumb drive for PC maintenance, including partitioning, backup and restoring, diagnostics, data recovery, and more. Current users can download the smaller update here.
There are a handful of great WinPE builds out there, and this is one of them. The software list is exhausting and would require scrolling numerous pages if we were to list them all. That said, to give you an idea:
Backups include Acronis, Nortons Ghost, Disk2vhd, Macrium, and more. Drive utilities include MiniTool, Macrorit, Defraggler, Auslogics Disk Defrag, Killdisk, and more. Diagnostics include AIDA64, Burnin Test, HWiNFO, OCCT, CPU-Z, and more. Data recovery includes EASEUS, R-Studio, Active File Recovery, and more. DOS programs include MemTest86+, MemTest86, Ghost, BootIt Bare Metal, Gold Memory, and more.
See what I mean? And this is only a partial list and does not even begin to cover the other categories, including drivers, antivirus, Windows installation, networking, and native mode.
Because it was built using WinPE10 and WinPE8, many of these utilities might work on older operating systems, including Windows 7 and Vista, but that's at your own risk.
Regardless of what your current computer problems are, Sergei Strelec's WinPE has you covered.