I purchased the multisim design suite, student version in 2007, and it worked fine. I haven't used it for a year because I didn't need it for my classes until now, but I can get the program to run. I get : "error 1304 error writing to file c:\Program files\National instruments\circuit design suite 10.0\database\mscomp_S.PRD. verify that you have access to that directory." I searched the forum but the similar problems and solutions listed do not address my problem. I am signed on as administrator and my firewall and anti-virus software has been turned off. I tried to remove and re-install the program but it won't load and I get this message. Have any solutions other than those listed in the forum been found for this problem?