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#11
Since you are traveling we can assume you have a laptop, can you give us all the system specs you can?
You should have a partition with a re-install capabilities, but won't do much good until we get it running again.
There are several ways to go with this, follow Golden's steps, that's the best one to start with.
If you get to a point where you need to save your data, consider buying an external hard drive.
There are stand alone programs, run from CD or USB stick, that can backup your HDD before you risk loosing anything.
Macrium Reflect free version
The Windows PE 3 Rescue Media function is excellent for this.