How do I get the default system files?

So I've been installing some visual style themes and now I went back to the original Win 7 Basic theme. All I have to do was replace Explorerframe.dll in System32, I also remember having to replace a file in SYSWOW64 since I'm running Win 7 64-bit. Anyways, I noticed that these buttons are still from my old theme, if anyone could identify what default system file are linked to these buttons and tell me how to get the original ones back and running, thanks a lot.

Picture :



p.s: this isn't in a normal explorer window, it's just when I try to save a picture from the internet or something like that.

It has been a while and I don't have a restore point from back then.

Have you tried using the system file checker?

SFC /SCANNOW Command - System File Checker

See if it repairs those, if not, we have some experts who will be along soon.

I did the sfc /scannow in the cmd but it always stays stuck at 38% and it gives me an error telling me it didn't not succeed to fix the files or something like that.

I don't have a CD for it but all I really need to need is the name of the .dll file that stands for those buttons I posted in picture above. If I remember correctly, I touched Explorerframe.dll (system 32 and SYSWOW64, but I know this isn't the one) and also maybe shell32.dll. I'm not sure at all

I believe its the one in SYSWOW64 since I remember replacing the one in system32 with a backup I had. Is there a way to download the Explorerframe.dll form SYSWOW64?