I want to get rid of IE8

Can I simply go through Add/Delete, get rid of IE8, then download IE7? I usually use Firefox anyway. I added the update to IE8 last night, and now I can't even deposit monies sent by e-transfer! I get a window stating that this function is incompatible with IE8 and will cause a crash! If I can't add/delete, how do I do it? Thanks!

Read this MS help and support article.

Thanks! It worked ! If IE8 stops me from depositing money from my clients, I want nothing to do with it.