Not a commentary on computer operating systems at all.
Rules:
Standard Sudoku rules apply.
Disjoint: Cells in the same relative position within each thickly-outlined 3x3 box contain different digits.
Sudoku-X: Digits do not repeat along the indicated diagonal lines.
Thermometers: On thermometer lines, digits strictly increase from bulb to tip.
Windoku: There are four additional regions marked in blue. Each also contains the digits 1 through 9, although the disjoint rule does not apply within these regions.
Estimated difficulty: 3 out of 5
Solve on SudokuPad