My Razer Lachesis cannot make changes.

[L4dd]

Its "config" does not do anything anymore, and I cannot remember when that this had first occurred.

crimsontide that is from the following linked thread has too had these problems that were with his same mouse:
http://forums.d2jsp.org/topic.php?t=61437705&f=188&o=50

Does anyone know whether that there is or is not a work-around or a fix that is for my issue, please?

[Danny Nissan]

I should first ask: Is your lachesis the 4000DPI version?

What driver are you using? There was major issues for me as well with the windows 7 version of the driver.

You could uninstall the drivers completly, update firmware to 1.94 if you have not already.

Install 1.94 firmware: http://www.razersupport.com/index.ph...d=474&nav=0,18

Reboot.

Then download and install this 1.10 driver: http://www.razersupport.com/index.ph...1&nav=0,18,134

Reboot once again. If you are on Win7 it might tell you that the driver is not supported bla bla bla, just click install anyway.

[L4dd]

It is the 4,000 D.P.I./C.P.I. version, and I have the 1.94 firmware and the 1.10 driver; I use Windows XP Home S.P.3.
I had tried reinstalling the driver.

Update: I have managed to get it functioning like it was before, but it was with my Vista machine, so this must be a software issue.
I must swap the mouse to my Vista machine so that I could make changes...