Icons changed after installing MS Office 2010 language pack

Got a little other problem though, and don't want to start a new topic so I don't clutter your forums.
A few days ago I installed a MS Office 2010 language pack, and suddenly a lot of my programs icons just resetted Even though they don't have anything to do with Office 2010. Is that possible?

Some programs that did change can be seen in the attachments.

All the Office programs changed their icon too.

Okay, I did a quick Google and came up with this tutorial. I tried both methods but it didn't work. All the icons have changed though, this is how they look now.

Still not okay though, I really wonder how to fix this, next to a System Restore....

Just right click each on each of the changed icons, click open with and then choose the default program of choice. Heres a tut.

Open With - Change Default Program

Bill2 said:

Just right click each on each of the changed icons, click open with and then choose the default program of choice. Heres a tut.

Open With - Change Default Program

Didn't work either, the icons are still the same like in my last attachment....

This is really sucking man, looks like shit atm :/

Okay I uninstalled the language pack and redownloaded from another source, the 32bit version this time and it STILL WON'T WORK.
I'm getting rather desperate now, it looks like complete shit atm and I can't stand it.

I wonder, if I just change the iconcache.db file to one from another computer running 7 64bit, one that shows the icons correctly, will it solve my problem? Is it recommended to do that because it seems kind of dangerous

I tried some other things, including using IconPackager to change the icon style and then change it back to the default, and it still won't work. Getting really hopeless here and starting to think there's no other way then to just format this shit....

How do I find the product key of my Windows 7? It's installed but I don't see the product key anywhere.
I did a quick Google and came up with this:

Win keyfinderProduct Key Finder For Windows 2000, Windows XP, Windows Vista, Windows 7, and MS Office 2000, MS Office XP, MS Office 2007, MS Office 2010 - WinkeyFinder.com

But when I ran it it didn't find my 7 key....