This week i will upgrade my windows from XP to Windows 8. Will there be a problem with the saved games, because i will probably have to re-install Inquisitor to my computer. Are the saved games stored somewhere in the hard disk? (yes i know its a stupid question).

Its not a stupid question, nowadays it is quite common to ask or do a web search on locations of save game files and folders. The saved games are stored in the folder Inquisitor_SaveGames in the location C:\Users\(Your computer account name)\My Documents\. Generally, it is always good practice to backup your save game data and important files to external storage media periodically and before doing any major hardware or software upgrade or install. So it is actually a good question.