Well, if both of your programs are freezing it stands to reason that you may be having an issue with your Windows install itself or with your hardware. Can you run a system restore and put the computer back to a time before you had these issues? Then, if you are still experiencing freezing you'll know that it's most likely a hardware issue.
Also, you should remember that Macs have the same number of problems as PCs, they just look nicer and cost more. Mac Mail has more issues than any other email client I've ever used. Windows Live Mail isn't spectacular but I would consider giving Firefox or Chrome (alternate browsers) and Thunderbird (alternate email client) a try. All of them are a step up from Microsoft's programs in reliability and usability in my book, and are free downloads as well.
Let me know if System Restore works and we can go from there.