Microsoft has informed owners of Windows 7 and Windows 8.1 machines that updating to Windows 10 when it is released on 29 July will result in certain features being removed.
A note on the Microsoft website about the upgrade contains a section entitled 'feature deprecation' that lists the services that will be removed when upgrading, which includes DVD playback, games and the entire Windows Media Centre tool.
"If you have Windows 7 Home Premium, Windows 7 Professional, Windows 7 Ultimate, Windows 8 Pro with Media Centre, or Windows 8.1 Pro with Media Centre and you install Windows 10, Windows Media Centre will be removed," Microsoft said.
As a result of this, computers that still contain a drive for DVDs will require separate playback software, such as from VLC.
Microsoft also said that Windows 7 desktop gadgets will no longer be available when upgrading to Windows 10, while the classic games Solitaire, Minesweeper and Hearts will also be removed.
However, the firm did note that its own versions of the games, called Microsoft Solitaire Collection and Microsoft Minesweeper, are available to download.
Lastly, Microsoft confirmed that moving to Windows 10 Home Edition means that updates will be enforced automatically, although Windows 10 Pro and Windows 10 Enterprise users will have the ability to defer updates.
The full list of what will change on moving to Windows 10 from older systems is available below.
Microsoft confirmed on Monday that Windows 10 will be available as a free download from 29 July to anyone with a Windows 7 or Windows 8.1 machine. The free download will be on offer for one year.
Reports emerged over the weekend suggesting that this would be the launch date for the OS, and Microsoft has now confirmed this in a blog post, written by Terry Myerson, Microsoft's vice president of operating systems.
"On 29 July you can get Windows 10 for PCs and tablets by taking advantage of the free upgrade offer, or on a new Windows 10 PC from your favourite retailer," he said.
"If you purchase a new Windows 8.1 device between now and then, the Windows 10 upgrade will be available to you and many retail stores will upgrade your new device for you."
Myerson also touted the return of the start button as a key feature of Windows 10 as well as several security upgrades.
"Familiar, yet better than ever, Windows 10 brings back the Start menu you know and love. Windows 10 is faster than ever before, with quick startup and resume," he said.
"Windows 10 provides the most secure platform ever, including Windows Defender for free anti-malware protection, and it's the only platform with a commitment to deliver free ongoing security updates for the supported lifetime of the device."
Microsoft released a video showcasing all the key features coming to Windows 10 as the firm tries to encourage as many people as possible to upgrade, especially given the lack of interest in Windows 8.
However, while the desktop version of Windows 10 now has a release date, Microsoft did not reveal any information on the mobile version, after the company confirmed earlier this month that it will also arrive "later in the year".
Reports of Windows 10's release date come as Microsoft pushes out the latest preview build to members of the Windows Insider programme.
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