Rather than backup all the OS just back up your documents and anything else that is needed. I would use a 2 or 4Gb pen drive for this (£12 to £24). Then buy a new HD (£30ish, reinstall and buy a copy of acronis true image. When you are up and running buy an external HD (£50ish) and back up, using Acronis, onc e a week. This will mirror your OS and restore the whole thing should take 30 mins. I would still use the pen drive to back up documents daily. just for now use the pen drive to back up docs.