O/S refresh solves issues

I have found that reloading the O/s solves many issues. There are special techniques for each version of Windows. Lets give detail instructions for each version to our co workers. Lets be specific where we found the detailed procedure IE technet article # Q???????
Windows 98 and Windows 98 2nd ED are two seperate beasts! as are the 3 versions of windows 95 A-B & C Rebooting into safe mode refreshes the registry to last known good one . Your turn