With the release of Windows 10, I know some are having doubts about upgrading. Well, before I get into any details, both UltraSeps and QuikSeps are 100% compatible with Windows 10. Although this doesn't imply that you SHOULD upgrade. I have usually stuck with the OS a Windows computer was originally shipped with and this strategy has served me well over the years.
Since there's no shortage of Windows 10 reviews, I'll consolidate my views to the down and dirty only.
Not surprisingly, Windows 10 is a major improvement when compared to windows 8.1, although if using Windows 8.1 along with the free Classic Shell, which adds the Windows 7 style Start Menu to your system, I can see no compelling just-got-to-upgrade-now reason to wipe a Windows 8.1 system that is running well. Regardless of the glowing reviews most are awarding to Windows 10, lets face it, the primary change is the inclusion of the Start Menu.
If using solid and reliable Windows 7, most likely your computer has some years on it and wiping a perfectly good Win 7 box to install Windows 10 may not be in your best interests and just might border on the insane.
While its true the system can be reverted back to its original state, its more than worth noting that you only have a month to roll it back! About 30 days after upgrading, the Microsoft Fairy takes the old system away forever as Mister Softy desperately wants to rid the world of as many Windows installations as possible not named Windows 10. So be careful with this and make sure to have a full system backup if deciding to upgrade.
I've been using Windows 10 on a new, just purchased laptop which had 10 pre-installed. Overall, this new OS offers a somewhat improved desktop experience although feels a bit sluggish with basic tasks. Its clean, refined, and makes sense after getting acclimated to it.
My initial complaint is it refused to see the network hard disks and Macs on my network. After creating another user account, then logging in and out from both, the other non-Windows network devices decided to magically appear.
The next depressing encounter using Windows 10 are issues with delays loading streaming videos, video not buffering correctly, erratic and jumpy playback or video simply not loading period! I've experienced this annoyance myself, along with several associates I've discussed the matter with. This problem mostly occurs when using Wi-Fi, regardless of signal strength and I have confirmed this with several other Windows 10 users.
Microsoft seems to be aware of this problem and will probably address it shortly.
Edit 9/15/15....The video streaming issue seems to now be resolved.
Another annoying issue with Windows 10 is when using multiple monitors. Some upgrading to Windows 10 from a previous install of an earlier version of Windows have had problems getting multiple monitors recognized. Additionally, those using three monitors have had little to no luck getting the third functioning, including fresh Windows 10 installs to new systems. Here again, at some point I'm sure this will be resolved.
Conclusion? On a brand new system with at least 8GB of RAM, you'll be a somewhat happy camper after a few days using it. The best plan of attack however would be waiting about six months for the bugs to get worked out if really wanting to upgrade.
If however your older system is running like a champ with many installed applications, plugins, dongles, proprietary software, etc., I would continue using it....as is. Why ask for a potential nightmare?
I'll be retaining the services of Windows 7 for a long time on my primary business system.