A new Microsoft Windows 7 operating system installation cannot display the STEP 7-Micro/WIN help (*.hlp) files because the required winhelp32.exe help viewer is not installed. To view the Help topics, you must use an internet connection and download the new winhelp32.exe file directly from the Microsoft download center.

Go to http://support.microsoft.com/kb/917607 and follow the instructions. You must download the Genuine Windows Validation component to get access to the download page where you can download the Windows 6.0-KB917607-x64.msu file (for a 64-bit PC) or Windows 6.0-KB917607-x86.msu (for a 32-bit PC).