Steam/IE problem...

A while back, I accidentally damaged my IE. (I use Firefox so I didn’t care that it happened and I can’t even remember WHAT happened.) Now my IE can’t connect at all and is affecting my steam program. I cannot view the store, news, or community, but can still receive steam updates. I think also because of this, Garry’s Mod won’t even start. It brings up the “Preparing to launch Garry’s Mod” window, then it says: “hl2.exe has encountered a problem and needs to close.” Any other game works without a problem. I’ve searched for remedies for the hl2.exe error, but nothing I found worked. My apologies if someone else had this problem. Your help will be appreciated.

Update IE

I did, no dice.

I reset IE fixed that problem but Garry’s Mod still does not work.