Steve, I'm assuming that your Wordpad files have a .DOC file extension. Open Folder Options>File Types tab and scroll down to DOC and click it once to hilite it, click the Advanced button then click the Change Icon button and choose which icon you want, hilite it and click OK. Note that the standard Wordpad icon does have a capital A in the lower right corner.
After having to do a complete recovery of my pc I backed up all my files and documents after the recovery was complete I put my document back on to my pc I have now noticed all the icons on my Wordpad files have changed they now have a large capital A on them. Now this is bugging me why this as happened can anyone help me on this and can I change them back to how they were.