Sure, you can have several browsers just choose the one you want to open, download and install Firefox, it's real similar to IE7, so it won't be totally new to you, and you can transfer bookmarks and such from IE to Firefox. It will ask if you want it to be your default browser, tell it no, then you can open the one you want until you decide which you like and see if the problem is with IE 7 itself or something else.
Tim