Recent Documents in File menu Disappears after a PC re-boot

The recent Documents menu in either Excel 2007, Word 2007, Powerpoint 2007
and others softwares disappears after I re-start my PC, everytime. I use
VISTA home edition.

A few weeks ago I did a clean re-install of Vista and Office 2007,
everything works blazing fast and well, except for the purplexing recent
documents that never keeps my recent files when I re-start my PC. I have also
noticed that if I change the "Show this number of recent documents" in the
Advanced tab under the Excel options it resets to 17 everytime, as well.

Therefore How can i have recent documents functioning properly and how can I
change the number 17 to any number of files I want?

thanks in advance

Well I've found my answer, after reading your replies I ... (first I must say
that I re-installed office and vista from a clean hard disk format a few days
ago)...uninstalled 2 programs the first being AVG 9.0 free anti-virus and the
second I removed Advanced Systems Care from IOBIT, a software that monitors
and repairs the registry, hard disk, etc.

Afterwards I re-installed only the anti-virus after verifying each time the
excel and others "recent Documents" and it works, therefore for me the
colprit is the ASC software.

Thank you.

"Serge" wrote:

The recent Documents menu in either Excel 2007, Word 2007, Powerpoint 2007
and others softwares disappears after I re-start my PC, everytime. I use
VISTA home edition.

A few weeks ago I did a clean re-install of Vista and Office 2007,
everything works blazing fast and well, except for the purplexing recent
documents that never keeps my recent files when I re-start my PC. I have also
noticed that if I change the "Show this number of recent documents" in the
Advanced tab under the Excel options it resets to 17 everytime, as well.

Therefore How can i have recent documents functioning properly and how can I
change the number 17 to any number of files I want?

thanks in advance