USB Mouse start to get on-off on off on off.....

[Beskar]

faulty connection? I allready explain that the very same mouse goes well in another computers.....

And the USB port itself are also fine, they can doing flashdisk dunctions perfectly, read external hd, powering laptop coolers...

Well, that is generally the issue with that sort of problem. My mouse I said about works fine with other computers, it only goes in on-off-on-off mode if the cable isn't a certain way. As such, I could easily slap it between computers and doing a fiddle, see cursor move and doubt it is the mouse as well.

You also need to put in qualifiers. Does it do this straight away and constantly? or is it every now and then temporarily?

You also say that other devices work fine with your computer, have you used another mouse with the laptop? if that works perfectly fine, wouldn't that deduce the issue is with the mouse, especially as the mouse has been working fine up untill recently?