Please remember this is a General User
Forum, if no one knows the answer they will not reply.
My suggestions are, depending on your settings and actions CSU does have a backup function.Registry cleaner restorePrivacy cleaner restoreDisk cleaner restore
If the above fails some browsers have a bookmarks backup/restore file, Web search for restoring bookmarks for your browser to possibly help find a solution.
If the above fails, you could try a system restore to a point before your actions.
If all of the above fails, I am sorry I personally have no more suggestions to try.
Bookmarks are of high importance to some people and I personally periodically export them to a HTML file for backup purposes.