Failed to Save
Maybe because you had the same file open in another program or another instance of the Tool you're running. If so, close it and try again.
Or because the folder you're saving to is a read-only folder on a network, or because the disk is full, or because your disk filing system has got screwed up. This last problem is quite common, actually, and is especially likely to occur if you often use large files in your word processor. In that case run Programs | Accessories | System Tools | Disk Defragmenter.
If you're working on a network, you will be able to save on certain drives and folders but not others; the solution is to try again on a memory stick or a hard disk drive which you do have the right to save to.