Just wanted to share my side of the Windows 10 upgrade story (from windows 7). Depending on the number of devices that your PC / laptop is currently supporting, the file size for the upgrade varies. For my PC it took nearly 2.2 GB size for the whole downloading of OS / driver files.
Using the 1 Mbps BSNL connection, it took nearly 4-5 hours for the download to complete. Then the Windows asked for a reboot, upon reboot, the windows configuration starts with absolutely no manual interaction from the user.
The actual upgrade runs by starting to copy the OS files, followed by driver files and finally the configuration starts.
The whole process took less than 1.5 hours and the desktop was up and running within another 5-10 minutes time.
1) Your old desktop and all the files are retained. Whatever theme packs you were running on before upgrade still exists (even installed ones). So the desktop still runs your themes that you would prefer to have.
2) Start bar is really beautiful and stylish with the search box at the left side. Default search engine is Bing.
3) Upon clicking the start button (windows key in keyboard), your recently used apps lists and the live tiles are loaded on the right side. Its rightly a marriage between Windows 7 and Windows 8.
4) In the start menu, there is an option to search for all apps, which would list us the apps in alphabetical order as in Windows phones.
5) Live tiles are stylish and updates real time.
6) All the applications that you had before upgrade still exists and runs perfectly without any hitches.
7) You can configure what live tiles you want to see.
8) The Start menu has settings option, which contains everything you want to configure in the PC/laptop (from device drivers, to installation of apps, to configuring background colors etc.)
9) Microsoft has dumped IE and has come up with Edge browser, which is good so far.
10) Default programs to open pics, videos will be setup
11) Windows media player is missing. Groove music player is the new kid on the block!
If you already have a webcam, that is connected via USB, you might probably need to download an update post setting up the PC. The driver will install additionally and set it up for being compatible with Windows 10.
Windows 10 is definitely sleek, comfortable and easy to use. With Service packs coming up, it is definitely going to fix any ongoing issues and make this OS a win-win for both MS and customers alike.
Windows 10 is free for an year post upgrade.
Note: In case you need to downgrade from Windows 10, you can do it only within one month of the upgrade. Post which you cannot downgrade the OS. This is a good option for customers to try out Windows 10 for now, and go back to the shell and live within their own comfort zone.