keyboard is casually freezing for some seconds

Hello

I use Windows Vista Home Premium 32 Bit. I utilise the Logitech Media
Keyboard Elite USB and I am experiencing the following issue: when typing
text (just like this one ) or playing games etc, just using the keyboard,
it freezes for a few seconds. During freeze the actual typing spams, so the
problem can just look like thisssssssssssssssssssssssssssssssssssss. This is
disturbing when typing text and it can be really anoying when playing games.

In order to make it easier for you to hopefully find a solution, my
mainboard is a EVGA nForce 680i-SLI. I already flashed the latest BIOS-Update
and the latest nForce-Driver is installed, too. I already looked for
standalone USB-Drivers, but found none, neither on EVGA's website, nor
elsewhere. The Setpoint-software from Logitech is also up-to-date. But due to
the fact that I don't experience any problem with my other USB-peripherals, I
would not be surprised, if the Problem is caused by the Logitech-Drivers.

This whole situation is quite frustrating, especially because it says
"Windows Vista Certified" on the keyboards package. Can anyone help me,
please?