OneDrive replaces all this Homegroup stuff anyways.
I get the point - instead of 6 copies on various partitions on devices just one permanent copy - once set up Homegroup.
I don't see your problem though - ALL YOUR FILES are on your 2 computers.
Just redo sharing - have you set to ON "ALLOW FILE & PRINTER SHARING" which a new Windows install may have set to OFF?
Can't stand it - Revert Windows to previous Build - just do so before any scheduled task deletes Windows.old in C. It should be a very large folder.
REALLY can't stand it -dual boot Windows 7 with Homegroup still going strong
Homegroup can access OneDrive folders if given access in OneDrive.