Some info

http://www.ghacks.net/2015/06/01/how-to-block-the-windows-10-update-notification-in-earlier-versions-of-windows/

(and there are other sites - that's just first one I grabbed)

The above implies (if you read on just a little) there will be a Windows 10 .iso at some point at or after release. Therefore, you will be able to do a FRESH install (OVER current install or on a new drive) and NOT an upgrade TO existing WIN 7 or 8.

I AM NOT PUSHING WIN 10 (just noting some possibilities). I fully expect to not seriously use or depend on it for WELL over another year (probably not even until sometime in CY 2017) or later if real issues.

I already dual boot WIN XP (yes, the OS that was going to be akin to Y2K) and Win 7 Pro: on separate HDD's. My Windows 7 install, even with me moving as much as possible of my music related stuff, with more than a few serious registry hacks, to its own HDD (D:\), still uses almost 700 GB (my PC is NOT a dedicated MUSIC only workstation). So I don’t want dual OS's in separate partitions on same HDD (that needs even MORE space). That's why I still don’t have a SDD (cost too much for a 1TB SDD JUST for Win 7 + all installs). SOON I Hope!

When Win 10 was first announced here, of all places, I went out and bought two more 2 TB HDDs (just to test) and built a DUAL BOOT Win 10 (preview) and WIN 7 Pro.

So I'm 99% certain folks will be able to keep their existing OS (Win 7 or Win 8). Either as dual boot partitions on a single HDD or via additional an HDD, as long as you have room in the PC case, one additional SATA port (hopefully few here are still using IDE connections but even that can be done), an additional POWER SUPPLY connection, to add one more HDD. A very workable, but moderate, sized 2TB HDD goes for about $80 or less! So not a real large cost impact.

An additional HDD this avoids any possible issues of upgrading OVER existing OS, loosing critical connections to HW/SW via unsupported drivers, or simply screwing up a single physical, but dual booted, HDD.

Laptop ONLY users of Win 7 or Win 8 (even Win XP, but unlikely that laptop HW could support Win X very well) can also do a dual boot. Although, that probably means dual boot from same physical drive. Getting a new larger HDD even for laptops is now also RELATIVELY cheap.

Even if you don't have chops to install 2nd, 3rd, 4th, extra drives or build dual boot HDD or opening laptop to install new drive, you probably have friends, family, or co-workers who would do it for you.

I WILL be TRI-booting (Win XP, Win 7, WIN 10) later - although I will be waiting until at least LATE next spring to do the "official" registered install - no rush here.

Larry

Win10Pro,i9,64GB,2TBSSD+20TBHDDs,1080TI,BIAB'24,Scarlett18i8,Montage7,Fusion 8HD,QS8,Integra7,XV5080,QSR,SC-8850,SPLAT,FL21&others,Komp.14,IK suite&others, just a guitar player-AXE FX III &FM9T, FishmanTP, MIDIGuitar2, GK2/3'sw/GI20