Hi Bob,
Deleting Individual System Restore points was only available with a 3rd party software like this one:
https://www.majorgeeks.com/files/details/system_restore_explorer.html
A better idea to make free space on the drive would be to examine the drive with Treesize.
https://apps.microsoft.com/detail/xp9m26rsclnt88?hl=en-GB&gl=IN
Additionally, the command below can be used:
In the Windows search,
Type cmd, right-click it, and choose Run as Administrator.
Execute:
DISM.exe /online /cleanup-image /startcomponentcleanup
I hope this information helps. If you have any more questions, don't hesitate to reach out.
Otherwise, please take a moment to rate the answer. Wishing you good luck!
Standard 3rd party link disclaimer:
There may be links to non-Microsoft websites that provide accurate and safe information. Watch out for ads on websites frequently classified as PUP (Potentially Unwanted Products). There is no need to buy paid products to fix your computers, as they sometimes do more harm than good.