$ver1 = "115.0.5790.99"
$ver2 = "115.0.5790.171"

Function verCompare($ver1, $ver2) {
   # returns whether ver1 is Less, Greater, or Equal to ver2
   $ver1Array = $ver1.Split(".")
   $ver2Array = $ver2.Split(".")

   # Decide which array has the least amount of subversions and we'll only compare the least amount
   If ($ver1Array.count -ge $ver2Array.count) { $count = $ver1Array.count }
   Else { $count = $ver2Array.count }

   # Loop through each sub version and compare them.
   # Once I hit a Greater or Less than I change the count to break
   # Out of the for loop because there is no need to compare further
   For ($i = 0; $i -lt $count; $i++) {
      Switch ( $ver1Array[$i].CompareTo($ver2Array[$i]) ) {
         -1 { $compare = "$ver1 Less than $ver2"; $i = $count + 1 }
         0 { $compare = "$ver1 Equal to $ver2" }
         1 { $compare = "$ver1 Greater than $ver2"; $i = $count + 1 }
      }
   }

   return $compare

}

verCompare $ver1 $ver2