I don't know what hs happened but there is only the first letter of the folder name being displayed (on the blue bar at the top)
I have run my PC in safe mode and this does not happen there
I have used CCleaner/registry fix/scan spyware and windows live onecare to clean the PC .
I am running AVG/Zone Alarm/Spyware Terminator.
I don't know what else to do.

Not sure what your complaining about exactly. Can you post a picture of the problem?

To capture... use ALT + Print Screen

Then open windows paint and hit CTRL + V

And your screen should pop up... save and send :)

OK, here's a screenshot.
http://img518.imageshack.us/img518/4070/foldernamecr9.png (http://imageshack.us)
I've circled what I am having problems with, note the full pathname but it does now display on the 'START' bar or at the top of the folder.

Suggestion: Disable/Delete Google Toolbar (http://www.raymond.cc/blog/archives/2007/10/22/only-one-character-showing-on-internet-explorer-title-bar-fix/)

Before this started happening, did you do a scan of your registry, or
Anything else?

Yes, I do clean my PC, sometimes more than once a day, and its not had this problem before? I will remove Google Toolbar to see if it's that that is causing a problem, if not I'll put it back on.

Pete

Even if Google Toolbar is the problem, which is the case in all the other instances I found of this problem, you might be able to put it back on after you uninstall it and the problem WON'T come back with the new install. Worth a try.

Also, Google desktop search. And, do any other user accounts display
This behavior?

I've removed the Google Toolbar and nothings changed! I've also got Google Deskbar installed. But why would the Google stuff affect the way folders are displayed?
Where would I find the Google desktop search? I don't think I've got that installed though?
No other user accounts display this as I'm the only user account on the PC but in safe mode it's OK.

If you create another user, you can see if it displays this behaviour.
If it does not, then just change over to that user account.

I created another user account (doesnt it take a while) which worked OK, it displayed te fodler name properly.I went back to the original user account and the folder name was back to full. I don't know what happened but it fixed it.
Thanks for the help.