Mint 9 (based on the latest Ubuntu release 10.04) just came out about a week ago, so it may still have a few unresolved bugs (and Ubuntu 10.04 is only about a month old, so there might be a few issues there still too)
I think major headaches are unlikely, but i you don't want to worry about the possibility of any such headaches right now, you could try Mint 8
http://www.linuxmint.com/oldreleases.phpYou'd need to download the iso, check the md5 to make sure the download wasn't corrupted, then burn the iso to a 800mb CD. Instructions are easily located by a little websearch
Drop the CD into the drive on the machine you want to install onto and boot from the CD drive (you may need to set boot order in BIOS to do that). Once the system boots to Mint, you'll have an obvious install option
Before installing, you might play around to see if stuff is working on your system. With a USB flashdrive or external hard drive attached, you'll likely be able to copy any critical lost personal files
Then click the install option and answer a few simple questions; you're not really committed to anything until you give permission to repartition. I generally allow use of the whole disk, but that will overwrite any of your existing windows files; side-by-side installation with an undefragged windows installation may be messy and unsuccessful, and if your windows installation isn't working anyway, I might suspect it's pointless
Finally check out pokerfan's post:
Linux equivalents to Windows software
http://www.democraticunderground.com/discuss/duboard.php?az=view_all&address=240x1953I haven't checked: some of them may be very easy to find and install through the menu system. If you have questions, post in our Open Software forum or in the Mint forums