[christ30mac]

Hi i have purchased an imac. I have a windows laptop at work with office 2002 on it.
I purchased office 2008 for my mac so that I can work on files at work and at home.
The problem is that at some point i have done something to the file that it can not be read on the p.c. or the mac. I have not a clue what I have done all that i can say as the document does not show up as the preview of the file but as a picture of a blank file. I hope that makes sense. When I try to open the file it says that it is not recognized and needs to be opened with the program that created it. It also will not open with the p.c. either. I have E mailed 4 sets of files with no problem and I do not think I did anything to them after. All os a sudden I can not open them. I have transfered these files from the p.c. straight into my documents in the Mac I do not know if this has anything to do with it.
A;so I have renamed these folders using info to this.
Please can any body help me.
Only been a Mac user for about 4 weeks.