I bought Compaq Presario Notebook of model CQ40-145TU in which Win Vista SP1(32-bit) is already installed. Now i like to install Win XP as secondary OS. As you mentioned i created one partition from c drive where the vista is installed and after booting when i tried to install XP, my laptop shows system crash message with blue screen and then i was not able to install Win XP. whether i need to install Win XP with any service pack or is there any possible ways to install Win XP as secondary OS with dual booting? So plz give me a soln regarding this.

before trying to install the XP operating system.....you must first try to find all the compatable drivers installed on that laptop for XP. This might be a problem. without having the correct drivers...xp maynot be able to install.

One other option is to try a a third party boot manager application such as GAG (google for it) and install it first then reboot and install XP as if it was the only operating system being installed.

Lurkswithin probably has the best idea if you are recieving errors. You need to be careful when partitioning a drive. What application did you use to partition it?
Should you get your vista working again,
http://www.syschat.com/dual-boot-vis...eady-1946.html
may be helpful.

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