Why install Ubuntu alongside windows?
After the content of the rival Zealot's posts have been discarded, the answer maybe simple. Installing ANYTHING new can lead trouble. and without having ot get hands dirty with virtualistation or BIOS editing, a person wanting to find if Ubuntu A) can cope with their hardware ( a friend with a 3 year old cube has huge trouble with graphics under Ubuntu GG) and B) suits them.
The familiarity of Ubutnu has allowed me to install it on gash laptops and pass them on to people where the op sys (usually win '98) is too clunky and insecure to be left on them. By getting people ot use Open office and Fireowrks on windows first, migration is a snip.
Support inquiries from those using Ubuntu have tended to be application specific.
for some people it's not suitable. Where they "must" have a windows program and Wine whines at it.
I have Ubuntu HH Beta ( with regular updates) on one desktop here, and windows and embedded Linux in the others, If the Ubuntu box can't reach the network i check the router, any other machine i check the machine itself. The Ubuntu box is entirely untroublesome. Many can and should be replaced by file compitable open source programs. (I've stopped paying a tithe to Adobe switching from actionscript to python for app writing).
Paris, because despite programming and using computers since '66 ( a Gross mechanical adding machine) the fierce inter-faith battles that go on between the followers of the one true Bill and the manic hordes of Linus Bluetooth the Viking., leaves me feel like a hand wringing vapid halfwit on the side lines...