how long does it take to upgrade from Windows 8 to Win 10?

It should take about 2-4 hours to install completely.

Some people get done in just a few hours, many take all day.

It took me about 3 hours....but I downloaded the iso file- burned it to a dvd and did a straight clean install- not an upgrade.

You better give yourself plenty of time.

We are M$. Resistance is futile. Your puters and lappies will adapt to service us. We will add your technology to our own. M$ has announced that Windows is NOT a top priority. Pushing people to use the cloud and mobile has become their main focus now. Now the truth about 10 is coming out.

Before downgrading to 10, you should know what you're getting into.

Windows 7 and 8.1 is far better than 10. Windows 10 is far better at being spyware then any OS previously released to date.

From Toms's Hardware:

When Microsoft created Windows 10, it tied in numerous monitoring and data collection tools. The operating system is capable of gathering your search history, web usage, Windows Store usage, details of what applications you use, voice recordings, emails, geographic information and just about anything else that is on your PC. This information is gathered in part for improving Windows-based services, but it is also used for market research and advertising purposes.

This is why M$ is pushing 10 hard because it means a big increase in their profit margarine when they sell the info they collect on you. That is why it is FREE. If you're not paying for it, you’re not the customer, you’re the product being sold. They have seen the profits that the smart phone makers are raking in by spying on their user so M$ decided to emulate that and cripple the desktops, laptops so they can do the same. That's why they built a back door in it so you can stop the OS with a firewall from phoning home. They spend years coping anything that Apple did. Hence we got Windows 8. Now they are going copy the smart phone industry and and force everyone to use APP. If you're not paying for it, you’re not the customer, you’re the product being sold.

With Windows 10, M$ owns your system.

YOU can no longer pick the updates you want installed.

THEY can choose which drivers are installed.

THEY can choose what THEY want on your system.

THEY even installed a backdoor in it so THEY can SPY on you at all times.

M$ total share of the OS market has dropped below 90% for the first time in many many years, down to 88.77%. It has been falling steadily since the release of windows 10. Last month M$ Windows lost a whopping 1.68% of the OS market share. The largest one month loss ever for them. All thanks to Windows 10. That is HUGE and I mean HUGE. Since they have been tracking OS market share M$ has always dominated and has never seen that kind of loss.

To show how bad Windows 10 really is, take a look at the chart below. You can see that 7 dropped roughly 4% of its market share. 10 only rose 1.2%, meaning those who system broke and could not find a 7 system did not run to 10. 8.1 actually gained .3% and the rest went to other OSes. Meaning Vista, 2000, NT, 3.1, various flavors of OS X and Linux grab a big share of those who left 7 and did not and would not use 10. M$ should, but wont see how bad 10 is. The people are speaking with their feet and running away from it as fast as they can.

http://www.netmarketshare.com/report.aspx?qprid=11...

Houston, we have a problem, the users have found out Windows 10 is spyware and are started to go back to their original OS.

We all thought Windows 8 would be the worse OS M$ would release and they learned there lesson. They made some good improvements in 8 when they released 8.1. At that point we thought M$ was on the path to redemption. Then they come along with 10 and proved us wrong. People who make a profit off spyware and love the government knowing what you do on a daily basis are truly in love with Windows 10 and think it is the best OS M$ ever released. You got to admit tho, they thought this out. They first developed a OS so bad that just about every one hated and only got 23% of the user to move to it, Windows 8. Most of them had no choice when buying a new puter. With everyone thinking that M$ couldn't make one worse they release Windows 10. People hated 8 so bad they jumped on the FREE OFFER for Windows 10 before they realized that it is spyware masquerading as an OS.

From Computersecurity wikia:

A backdoor is a means of access to a computer program that bypasses security mechanisms. (WINDOWS 10 data collection bypasses all firewalls) A programmer may sometimes install a backdoor so that the program can be accessed for troubleshooting or OTHER PURPOSES. However, attackers often use backdoors that they detect or install themselves, as part of an exploit.

From Wikipedia

Spyware is software that aims to gather information about a person or organization without their knowledge and that may send such information to another entity without the consumer's consent, or that asserts control over a computer without the consumer's knowledge. Spyware is mostly classified into four types: system monitors, trojans, adware, and tracking cookies. Spyware is mostly used for the purposes of tracking and storing Internet users' movements on the Web and serving up pop-up ads to Internet users.

From Extreme Tech

There are certain new “features” of Windows 10 that can’t be blocked by any OS-level tweaks, including the hosts file. The updates listed above connect to vortex-win.data.microsoft.com and settings-win.data.microsoft.com. These addresses are hard-coded to bypass the hosts file and cannot be prevented from connecting. It’s been reported that software firewalls aren’t sufficient to block them, though this is unclear.

Resistance is never futile. Do not allow your puters and lappies to adapt to service M$. DO NOT allow your technology to be added to and controlled by M$.