Yeah...I went for battery life and portability this time. OS X is nice, but I still have Windows on the MBA via bootcamp for some softwares that I need. Mum is doing well, she came to visit during the summer.
is it ever! I'd definitely backup your file/data to a flash drive and maybe also a cloud based service first (Google Drive, Dropbox). Perhaps you can check the "Event Viewer" in Windows upon next boot to see what might have happened before the freeze.