As a Mac guy with zero PC ability I recommend iPC to start. As for where to get it, ahem.... google is your friend. As for what to do, you need to do your homework. You need as much information about your system's hardware as possible, look on the iPC website there is a complete list of the drivers the disk includes. Compare these to what you have and try to create a matching install. It may take several tries before you get everything right. Lots of little things like PCI cards or sleep may not work right away, search the forums its nearly certain that some smart and crafty monkey has already figured out whatever problems you are having. Good luck.