How can a restore partition get corrupted?

Giganews Newsgroups
Subject: How can a restore partition get corrupted?
Posted by:  Philo
Date: Tue, 11 Feb 2014

I just worked on a Gateway laptop.
The machine was filled with trojans and almost completely
non-responsive, even after removing them by the use of a Kaspersky
rescue cd.

Backed up the data and attempted a factory restore which could not get
past the part of the post-installation "additional software" stage.

I had to boot to safe mode and remove the startup registry entries.

When all done the system was very sluggish and not acceptable.

After performing a RAM test and hard drive diagnostic and confirming the
H/W was OK  I just did a fresh install from DVD and the system works fine.

I'm wondering if the entire hard drive had somehow gotten corrupted?