I have had two Tecra M11-17V laptops. (the first was stolen then replaced with an identical one)
They have both had the same issue where the machine would occasionally freeze for about 5-10 seconds.
The freezing usually occurs when moving the mouse over a button or menu, for example, the close button on any window.
It doesn't happen everytime the mouse goes over, just occasionally. It also occasionally occurs when right-clicking.
Usually the laptop will resume with no problems, but some apps lock up after this happens.
The issue occured from the moment I got the laptop, with just the base Windows 7 install.
Excatly the same on both machines.
I think PauPau is right and according the Toshiba document you should update the fingerprint software. The update you can get here: http://eu.computers.toshiba-europe.com > Support & Downloads > Download Drivers
Furthermore I would recommend updating your Firefox version, latest one at the moment is 4.0.1 as far as I know.
Have you connected external devices to your notebook?
The issue occurs in all apps and in Windows. Any icon or menu that responds to the mouse moving over it may occasionally suffer from this problem. Right-click menus and the task-bar preview thing can also cause it. It's only occasional though, maybe two or three times an hour.
Firefox just tends to lock up when it happens though, whereas most other apps recover. The Firefox locking up may not be directly related to the freezing problem, I've just assumed it is because it only happens on this model of laptop and it's caused by right-clicking.
So possibly the processes which are running in the background are responsible for that… as I suggested above, this might be related to busy CPU or allocated memory.
If this issue would happen you could check Task Manager which process uses the CPU and memory usage
Maybe this would help to identify the reason for that...
By the way; the Tecra support the TOSHIBA HDD Protection sensor... this sensor stops reading/writing the data on HDD in cases the notebook has been moved... this could lead to short freezings too... disable this for check.