Hi,
First (if you didn’t do it before the install) back it up.
What kind of install did you do? Is the Canon printer known to work with Tiger?
I would boot from another partition and using Disk Warrior or Disk Utility repair the drive.
Then use Disk Utility to Repair Permissions.
Then test.
If its still not working reinstall Tiger and either do a “Archive and Install” (much more reliable than a normal install). Check the box that is something like “save network settings and preferences”. This should work.
Another option would be to do a fresh install (still more reliable than Archive and Install), this might be called erase and install.
If you do the fresh install test and if everything is working correctly you could try (should work unless it tries to install the Canon) using migration assistant to import your old applications and files.
If you get it working (one or both of the above should work) don’t install the Canon again unless you test it on another partition or you can verify it works with Tiger. Even then do a back up first.
Best Wishes,
Mitch