Have you tried a fresh install of Chrome? According to this article it has been a problem in the past. Quite a few posters say that they just installed a new version without uninstalling the old one and it worked with bookmarks in tact. I don't know if you are prepared to take the risk. I believe that it has something to do with the .net framework. Are your updates up-to-date?
What to do if you're affected by the Intel Foreshadow flaw