Accordingly, can I upgrade to Windows 10 from Windows 7 without losing data?
Upgrading from Windows 7 to Windows 10 will not result in data loss . . . Though, it is always a good idea to backup your data anyway, it is even more important when performing a major upgrade like this, just in case the upgrade does not take properly . . .
Likewise, what happens when you upgrade from Windows 7 to Windows 10? The most important thing to remember is that the Windows 7 to Windows 10 upgrade could wipe your settings and apps. There's an option to keep your files and personal data, but because of differences between Windows 10 and Windows 7, it's not always possible to keep all of your existing apps.
Beside this, is it worth it to upgrade to Windows 10 from 7?
No one can force you to upgrade from Windows 7 to Windows 10, but it's a really good idea to do so -- the main reason being security. Without security updates or fixes, you're putting your computer at risk -- especially dangerous, as many forms of malware target Windows devices.
Will I lose all my files if I upgrade to Windows 10?
Once the upgrade is complete, Windows 10 will be free forever on that device. Applications, files, and settings will migrate as part of the upgrade. Microsoft does warn, however, that some applications or settings “may not migrate,” so make sure to back up anything you can't afford to lose.