Repair / Optimize Tables - error.?

[Gamelobby]

My site is slow, very slow from time to time, & when i try to optimize the tables.. it has real issues, & i usually get an Internal Error page.



I can select a few to optimize, & it will work, but the first ones i notice to have problems is the

adv_links
adv_links_banners
etc..

So im wondering what these are..?
My guess is the vBAdvanced Links mod, but i haven't had that installed for a long time, i uninstalled it a long time ago, & i see no traces of it anywhere. (acp or server)

1. Any idea if in fact that is what these are.?
2. Any ideas on what else could be the problem, because even when i dont tick those, it can still give me errors.


Thanks