FIRST WAY
STEPS
- Open Minesweeper and select the window.
- Type xyzzy
- Hold BOTH shift keys for 3 seconds.
- Release shift, and hover your mouse over the mine field.
- Look closely to find a very tiny white square on the top left of your desktop, it should be about 1 pixel in size. Not the minesweeper screen but your computer backround. A white dot means it’s safe to click, and a black dot means that there is a mine.
- For MineSweeper in previous versions of Windows, i.e. before XP, search for the file winmine.ini
- Open this file (using notepad, wordpad, etc.)
- You will see entries for best times. Edit those entries, modifying the names and the times to reflect your times!
- You are a MineSweeper champion! :)
SOURCE – http://www.wikihow.com/Hack-Minesweeper
SECOND WAY
Today I will show you how to cheat in minesweeper. It’s very simple, but we will be editing the registry. You should back up the registry with one of those free programs out there before you mess with it, unless you are an extremely skilled programmer. If you don’t, and you mess something up, your CPU is screwed. Anyway, to get to the registry, go to Start, Run. Type regedit and then the registry should appear. Find the following key:
HKEY_CURRENT_USER\Software\Microsoft\winmine
After you find that, look for names and times. You can edit these by right-clicking, and it’s pretty much self-explanatory. Comment if you have problems.
Source – http://seansoni.blogspot.com/2006/10/how-to-hack-minesweeper.html