Hi !
I just downloaded SDK SP1A, but the .exe won't start

Anybody met with this problem ?
I've tried download from different websites, save it to different hard drives, but I can't install it.
I have SP1 installed.
What's happening when you click on the .exe? Nothing (like the computer just sits there)? Error message?
Sometimes when you download files and such from the internet they can become "corrupted". Now, "Corrupted" sounds very ominous like "virus". In this case, that's not what I mean by "corrupted".
During the download process (as your computer tranfers the contents of the file/folder/program you're downloading) it become corrupted with pieces of that file/folder/program missing information. This is what I mean by "corrupted".
I've experienced corrupted programs a handful of times when I've downloaded programs from the internet, including simple patches. It's just something that happens sometimes. Think of it as a "hiccup".

The only solution to a corrupted file/folder/program is to redownload.
So, in short, try redownloading.