Nothing that drastic - specially not windows. First cleanup current installation and try reinstalling openemr. If you encounter any errors / warning displays, then you may end up reinstalling xammp components - only if those errors have not been discussed on this forum.
If you have another machine, you may find it faster to install an Ubuntu or Mint server and deploy OpenEMR docker as a ready to run system.
PS:
Hopefully you are also following the discussion - XAMPP version for EMR - 5.0.2. Windows 10