Hi.
I have installed the game on laptop Lenovo T400 (C2D P8400 with Intel 4500 gpu, Win8). Unfortunately it doesn't run smooth, especially dragging mouse cursor seems to be very slow and it looks like FPS gets very low rates. I think it isn't normal, maybe the problem is Windows 8, because hardware should maintain this tittle. I will try to check it on my desktop machine when I have some free time. But if you have some experience I would appreciate any help.

Very unsual as this game has rather low requirements. I'm usually running a couple of apps in the background while playing this and no problems. Is it only slow when your have the "clock" on one of the fast forward settings (molecules are moving) or it's lagging in regular "edit mode"?

When I enter a map (board) where you place elements of molecules it immediately starts lagging, I don't have to execute anything. While in the main menu everything is fine, but to be honest short time after lunching the game when the menu is darker and slowly gets brighter then during that period also mouse lagging. I have also noticed that cpu usage is at the same level ~60% at any time.

I think this may be something specific to your computer as I do not experience anything like this. Do you have another computer you can try it out on and see if it's actually the game or something specific to you specific computer? Hope it works out as this is a great game to play.

Yes, I've tried on my desktop and everything works fine, cpu usage on about 16%. Then I did some research why it was not working properly on my laptop and the problem is gpu driver delivered in-box by Microsoft. There is no official way to install another Intel 4500 MHD driver on Win8 at this moment, but here is a complete workaround how to do it using a latest Win7 drivers:
http://www.neowin.net/news/how-to-install-legacy-intel-hd-graphics-drivers-on-windows-8

Tested and 100% working. But solution is based on Intel HD drivers, so you have to download correct drivers for Intel 4500 MHD (ex. from [url=http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22166&lang=eng&OSVersion=Windows%207%20(64-bit)*&DownloadType=]here[/url]) and change kit49684.inf instead of igdlh64.inf.

Hope this helps someone. Thanks also Invenio.

Glad you got it working. I'm at 2/3rds done with the game and although it's getting to be real challenging, it's tons of fun. Enjoy!

only when i open the list with all elements the mouse is a bit laggy