Firefox problem in Vista

[Brian Stuart]

I'm running Vista Business Edition 32 bit and when I try to open Firefox I get an error message that says "The program must close to allow a previous installation attempt to complete. Please restart"
I've restarted Firefox and Vista but I get the same message. I have uninstalled and reinstalled Firefox. It installs OK and starts when i have finished the installation. When I close it and attempt to restart I get the same message.
Any ideas?
Thanks

 

[Brian Stuart]

Managed to finf the solution on the Firefox site. You have to go into the firefox folder and delete the "xpicleanup.exe" file. problem is Vista won't let me do it It says I don't have sufficent privileges
help please