Per Dell the T7910 workstation runs a Xeon® processor E5-2600 v3
dell[.]com/en-my/shop/cty/pdp/spd/precision-t7910-workstation
It does not appear that CPU is officially supported for Win11
learn.microsoft[.]com/en-us/windows-hardware/design/minimum/supported/windows-11-supported-intel-processors
That's not a terribly big deal, though you'll want to download a Win11 ISO & then use Rufus to write it to a USB stick. During that process Rufus will turn off hardware checking.
microsoft[.]com/en-us/software-download/windows11
rufus[.]ie
Optional...
You *might* want to perform a disk image backup to another internal or external drive. You also *might* want to perform a repair install of Win10, by running setup on a mounted Win10 ISO while Win10 is running. If you do, run Disk Cleanup afterwards [from the properties window for the Windows drive in File Explorer] to get rid of any junk, including the windows.old folder if it exists. The reason for a repair install is that it might fix stuff, and the better shape Win10 is in, the better shape a new install of Win11 will be, since it will migrate everything that exists in Win10. Upgrading to Win11 *should* clean up the registry, but the less junk there is in Win10's registry the better the result upgrading. The reason for a backup is in case the upgrade does not work for some reason -- restoring the backup will put things back exactly as they were. A 2ndary reason is if some critical software doesn't make it into Win11 still registered, you can restore Win10 to another drive or partition, use EasyBCD to add it to the boot menu, and boot into Win10 instead of Win11 to run that software. AOMEI has a free version of their Backupper software and Hasleo offers a free image backup app as well.
Software...
Chris is 100% correct, all of your existing software should be migrated, including its activation. You *might* have to experiment with the compatibility settings on some apps -- in File Explorer right click the .exe file that runs the app, click properties, then the compatibility tab. Where the registration data for each app is stored varies. It might be included in a file, usually in the program's folder, the Users folders, ProgramData, or Windows. Or it might be in the registry. If an app is migrated but not activated you *might* be able to find the necessary file in Windows.old, which stores all the files to revert back to Win10. More complicated [Google for directions] you can also mount a Win10 backup image [if you created one], then mount its registry in Regedit, exporting any needed keys, then merging them into Win11's registry. Generally though, you should not have to bother. Some software creates and uses a hardware ID, but since you're not changing your hardware that ID should stay the same. If the upgrade process skips an app for some reason, you should be able to find it in Windows.old too. Copy paste the folder(s) to their normal locations and hopefully it'll work -- remember you might have to tweak the compatibility settings.
