True Image Home 2009
ceates an exact image of the entire drive(s) (partitionS)
usb is supported - so your external is ideal
if all goes tu - you restore the image ... and 20 mins later your system is working
only 1 danger ... if the problem is due to something you loaded - and then you image it ... it will restore the problem.
I've used imaging for many years Not with acronis - I know but at work we use powerquest - a more techie prog) acronis is for home - and is excellent for that
... my method is a virgin image ... just o/s and drivers - progs come and go.
a second image ... basic progs added ...
a third image ... current system ... 1 week old
a fourth .... current system
the software will save incremental backups - so using 3 and 4 just walk through the backups ... 1 week old and current .... alternating
http://www.acronis.co.uk/homecomputing/product s/trueimage/
the software will create bootable restore dvds so 1 and 2 go on dvd ... somewhere safe ... that way you can recover a basic system in most situtions (useful to prove if its the software or machine)
if you don't need it - just backup - today - burn to dvd ... then add to the backup whenever you do something.