For the average user, I would avoid the free upgrade. I have nothing against Windows 10 (been using it for 6 months), it will be a good product. But, historically, upgrading the OS has never been a good thing. Most of the bad stories you've heard about *ANY* Windows upgrade came from idiots that did an over-install on an old PC.
If your Win7 machine is running well, just stick to Win7. Win10 has little, if any, advantage. If your Win7 machine is a bit jiggy, doing the upgrade is likely to just transfer those problems to the new environment. You'll be operating under an ongoing question mark.
If you *MUST* upgrade, consider backing up all your data and settings, and doing a full clean install of Windows 10. It's extra work, but you'll have a lean/clean machine.
The safest way to go to Windows 10 is to get it on your next new computer.
PS. Win9 was skipped because there was a bunch of potential problems with programming code that referenced Windows9 (from Windows 95/98 days). The problems were not so much with Microsoft products, but a ton of 3rd party software that may be affected.
When I bought my current VIAO, it was already advertising the upgrade to 10 and that it would be free. My hardware doesn't typically last more than one major OS cycle, and I always buy the most machine available so typically a single generation upgrade doesn't cause me an issue since I am always still well above the minimum spec. Typically it's when you go for the third generation upgrade you run into problems.
), which is why I decided to rip out the HDD in my new laptop and replace it with a SSD, to experiment with Windows 10 Tech Preview. (well actually, I just wanted to experience the lighting speed of Solid State Drives).
well said
