I have just installed this program, have made NO changes to configuration. I just selected to see a different chart and got the error: Access violation at address 005CC309 in module 'speedfan.exe'. Read of address 00000022. Have I anything to worry about here? Thanks for any help. Oh, and on another note I can see on my Readings section the following: Debug Info: Intimer Reentrancy Avoided. Please report to email@example.com. Also, apart from me reading through the help files how does this program actually help fan speeds and temperature control. It seems to just read. Shouldn't it actually detect the best settings and apply them?