Hey, 2 weekend's ago, I spent the best part of a day trying to get rid of a stack of viruses and trojans off a friend's son's windows computer. I gave up after 5 hours, sent it to a tech, and he sent it back saying it was resolved, when it wasn't. To be continued.
Wasn't made any easier by XPs default set up of dispersing data and personal settings amongst the OS partition.....nor a built in partition backup and restore capability, nor a decent built-in backup scheduler .
Microsoft deserve brickbats for not prioritizing OS and data safety.
Anyone who does anything productive on a computer should not touch a system that cannot have the OS or data faithfully restored to several points back in time. Windows attempts at this give a false sense of security.