peBuilder è un piccolo sistema operativo che parte da cd e che permette di ripristinare installazioni andate a male di windoze:

Here are a few things that are possible with WinPE and are not possible with any type of dos-based boot disk, even when using network support and ntfsdos:

* Accessing very large (>2TB) NTFS volumes or accessing volumes that are not seen by the BIOS, like some fibre channel disks.
* Very reliable scanning and cleaning of viruses on NTFS volumes using a “clean boot”.
* Active Directory support.
* Have remote control over other machines, using vnc or remote desktop.