WMS 8.3 did work well with OS windows XP with my former laptop, but now my new PC's OS is Win 7, I even could not successfully install it completely, only the HEC-HMS 3.4 and HEC-RAS 4.0 were installed.I would use the CE-QUAL-W2 module as mentioned. To notice that, at the last of the installation, the installshield wizard showed that WMS 8.3 was installed successfully.However, there is not the WMS 8.3 in the program list. I tried more than three times, it seems the module GSHHA has installation bugs or else.I checked for the operating system requirements, they are windows XP or VISTA, wit