I have previously installed win7 and had no problems with both games and there is nothing Funcom has changed that would break it. you sure you didnt copy over games folder from other partition and windows dont have permission to write to those folders? I mean some people copy the RDB since they already downlaoded it. but if its a different install you cant copy the folder called RDB BUT you can copy the files inside the folder.
if you do it this way delete all the folders. start install again. end the patcher when it starts downloading the 4gb files. delete contents of RDB folder and then copy over files from other install. you cant copy over entire folder of install. (just in case thats what you are doing)