If you have not tried, please try this first: click Start->All programs->Accessories->System Tools->System Restore and restore the computer to any date before this issue has occurred.
If it does not work, please download and install the Revo Uninstaller program at http://www.revouninstaller.com/start_freeware_download.html , then open it, and select the Microsoft office program, then click on Uninstall , then select the Advanced option , then select all whenever prompted, and delete and confirm , then restart the computer, and reinstall microsoft office.
(Note: if you cannot download and install the Revo Uninstaller program, you can go to Start, control panel, programs, programs and features to uninstall office, then restart the computer and reinstall office.)
Please let me know if there is still any issue. Thank you.
I downloaded Belarc and got my key. I then downloaded Revo and uninstalled Office. I then downloaded 2007 Pro from the tinyurl site but it won't except my key. It may be because it was an OEM version. I'm happy to try purchasing 2010 for c. £100 but I don't suppose I can guarantee it will work. If I have some sort of registry problem (corrupt or missing file for example). I'm nervous about paying c. £100 for something that won't work. Any thoughts please?
I realised after writing my last note that I'd only be downloading a trial so there was no cost if it didn't work! Anyway, I went ahead and downloaded Office 2010 and it all seems to work fine. Many thanks for your help.