System preferences is frozen

Hi

I am unable to use system preferences for one user only

I have run disk utility, in safe mode as well as well as used /bin/fsck -fy

All my systems programs are up to date, with nothing left to update in Apple store.

Still the same problem

I have had this issue for a few days and this morning browsers also froze..By running above and creating a new identity the main identity is now back to just system preferences issue.

Any way of troubleshooting?

many thanks,

Andrew