Bookmarks can be backed up and imported again after a reinstall. See https://www.google.com/search?q=chrome+backup+bookmarks
Things to try before reinstalling:
1. Make a new shortcut to the program. Does that work?
2. Run it directly from Windows Explorer. What happens?
3. Try the 2 above things in a new Windows account. What happens?
I am using window 7 with chrome browser but it stopped working when i clicked on it nothing happens i don't want to uninstall because i will lose my important bookmark.