Please help me restore the original Safari that came with my MacBook?

You have to upgrade to Mac OS X Mountain Lion 10.8. $19.99 at the app. store. It should be straightforward since you are already running Lion 10.7.5.

Here are the details

If I understand your question, you don’t want to update to the latest OSX, but rather, revert to the previous version of Safari. If so, Try this link.

@gailcalled Okay, so I purchased Mountain Lion (regrettably). However, every time I try to download it eventually it will fail and tell me to check my internet connection, which is fine!

@desiree333: When I tried to download Mt. Lion on my Mac, my internet connection was too slow (medium speed DSL with a crap server). So I took the laptop to an Apple store with a fast broadband, and they did it for me overnight.

So perhaps it is the speed rather than the connection.

Call 1–800-MY-APPLE and ask someone.

@gailcalled There is a Apple-certified store at my uni, I’ll just bring my laptop to them tomorrow. It must be the speed, I have an old router and sometimes things get kind of slow..

Sounds like a plan.