System came preloaded with bloatware or lost your recovery discs? Here's the fix

I have been trying for ages to figure out how to get a clean install of Win7 on my Acer laptop. It came loaded with enormous amounts of difficult to remove bloatware and I've resorted to using CCleaner to remove as much as I can, creating an image of the "clean" system and then booting from the image when I want to restore. Still I know there are remnants of the old programs and sometimes it's difficult to tell what is unnecessary bloatware or residual files and what is actually part of Windows (at least for a middling at best amateur computer "tech" such as myself). I've always felt if I could get a clean install on the system that it would be less annoying and sluggish as well as secure. I have a Win7 Pro disc I bought for my DAW but the laptop is licensed for Premium so that's no good (or so I thought). All my friends who would have such a disc live quite far away from me so I can't just ring them up and borrow one. Occasionally when the computer was ticking me off I'd look around online to see if I could buy just the disc off ebay or the like for cheap but could never find them or they looked pirated/sketchy and I most certainly didn't want to trust an ISO from some random pirate site. I was to the point of just buying another disc+license... until today.
 
I have no idea why this never came up in my searches before but I just found the following article on PCworld explaining doing a clean install using an OEM key and creating a universal Windows ISO if need be from a mismatched disc...
 
http://www.pcworld.com/article/2044281/install-any-version-of-windows-using-any-windows-disc-you-can-find.html
 
Cool. So that tells me how to strip out the part of my Win 7 Pro Disc that locks it to Pro and change my laptops product key BUT at the bottom of the article it linked to this...
 
http://www.w7forums.com/threads/official-windows-7-sp1-iso-image-downloads.12325/
 
It is a list of clean ISOs for all version on the Win7 forums. Totally legit and legal and hosted on digitalriver which I know MS uses as a download server so it should be safe.
 
I'm sure many of you smart folks were aware of this but I thought I would share this knowledge for those dealing with bloatware infested computers which can of course impede with DAW performance.
 
Today is a good day. Cheers.