http://www.zwsoft.com/forum/viewthread.php?tid=2585 My notebook is an HP EliteBook 8540w Mobile Workstation, I've just installed the SP1 patch for ZWCAD2012+ and since then every time i launch the program the cooling fan keeps working MUCH more, the CPU usage rapidly increases and so does the temperature: a couple of times, after working for few hours, the pc just shut out... while using ZWCAD2012 (not the + ver.) nothing like this ever happened, (but it had too many problems so I had to patch it with SP1...) And also: is there a way to avoid to load new instances of the program when double clicking on the dwg files to be opened? Thanks in advance, especially for the SP1 patch solution (i hope...) mivalen5361 2013-01-29 16:01:32 http://www.zwsoft.com/forum/viewthread.php?tid=2585&pid=16865 Hi sir, it sounds quite strange because we have got any feedback on this issue, and we cannot reproduce the problem in our side, so it seems hard to figure out the problem. Have you tried to uninstall the whole ZWCAD+ and reinstall the SP1 version again? huangy8949 2013-03-28 15:41:10