Well, being able to read electronic documents is essential for working with computer programs. CHM is the standard Windows help document format. You won't find many help manuals still in .doc or .pdf format nowadays.

Using Gamestudio without tutorial is certainly a severe handicap, so we'll work together to get your PC fixed. I need some information about your system. Which XP version are you using resp. which service packs have you installed? Can't you read any .chm documents or does the problem affect only the workshops? Can you read the manual? What happens when you click Help->Help in SED?