Windows 7 - How do I know which service pack I need?

I need to download the service pack 1 (stand alone version) for a 32 bit Windows 7 Pro version. I need it so I can do a clean install. I wasn't able to make a rescue CD after it installed itself via updates, the backup no longer works. Not only that, but I've found I can't right lick on my desktop and create a folder on the desktop. Yes, I know there are ways around that problem and that is what I've been using.
I've been working on some rather extensive files and I would like to back them up, and keep them backed up, to my external HD.
I can't do a repair because I don't have a rescue CD which includes the SP1.
There are about 10 different ones on that page and I don't know which I need. Is it the 1 GB one??

It is a good ides to run the update readiness tool first to make sure you have all the required files.


Please run the update readiness tool and then update to SP-1


Ensure you install the correct 64 or 32 bit option for your system)
Download the System Update Readiness Tool (64bit)
Download the System Update Readiness Tool (32bit)


Now update to SP-1

Learn how to install Windows 7 Service Pack 1 (SP1)

You download it through windows update.

Here you find all the links for an .iso download: http://forums.mydigitallife.info/threads/28517-Windows-7-w-o-SP1-and-SP1-Media-Refresh-Direct-Download-Links

I agree with whs. If you are planning to do a clean install, why not just use the SP1-incorporated disc from the get-go?

I didn't know I could do that. That sure would be easier. Will let you know how it goes
Thanks

I went to the link site, again I am confused as to which one I am supposed to download? They also talked about having to run a file removal tool. I don't know if I need that do I?? I've included pics
I want to make sure I'm on the same page as you guys. The ISO image I will be downloading will be the full thing, SP1 included? I downloaded an ISO but it was only 4 MB, it was the second one with new releases. Then after I downloaded it I see there is one below that one, it has a "N" next to the the x86.

You want to download the Media Refresh version that you have a license for. The N version has components sripped out for European markets, so you can skip that one.

The removal tool will remove the file mentioned, and turn your disc into a multi-install...meaning if you have the x86 version, it will give you a menu to pick which version...Home Premium, Pro, etc. Most of us are installing from USB flash drives and have deleted the file from the flash drive.

Want to make sure I'm doing this right. I have the ISO image for Media "refresh". If it's a refresh, can I do a repair from that instead of reinstalling?

My biggest problem is not being able to use the "backup" feature in the Pro version. For some reason it keeps telling me that the class is not registered. Is there some way to find that file on the disc and register it? I have my original Pro version disc too. I have so much stuff on my PC that I would have to backup before I could reinstall. I hate doing that if there is some way around it.

It depends. You should always try to repair with the same SP level as the installed OS. So, if you have SP1 installed, then the media refresh disc would be just fine. If you don't have SP1 installed yet, then I'd get the earlier disc.

Those are plain vanilla discs, so they can be used to repair or do clean, fresh installs.