Halo opens on one account but only runs the promo video on the other account. The menu flashes up but goes directly to the promo then shuts down. Is this malware

Question

I'm not sure I'm in the right discussion group.
On my husband's laptop OS 10.6.8 he opened Halo which has worked fine in the past. Instead of the usual loading then menu it flashes on screen the menu then immediately launches into a video which features all the maps on Halo then quits. I tried removing and reinstalling from the disk but no change. However I opened Halo on his administrative account and it worked fine.
Can anyone tell me how I can check what is interfering with the game? He recently got an email that contained a virus but didn't download or open the attachments. Removed the email from online account by putting it in the trash which was also online.
He is not very internet literate and downloads files without caution sometimes. I'd appreciate any input.
Thanks

Answer 1

I know nothing about this game, but since it works in the other account the problem might be a corrupt preference file. Go to the library>preferences in your home folder and see if there's a file named halo something.plist. Move it to the Desktop and see what happens if you open up the game now. You will probably have to redo some settings for the game.