Have just got back my notebook from IT department.
There was several taugh freezed conditions.
They claim WebClient (part of Autodesk Remote) eates up to 3.5GB of RAM.
Most funny that it was several month that I tried to at least run Autodesk Remote without any real success (see http://forums.autodesk.com/t5/Remote/Fail-to-install-quot-Service-uninstall-error-code-4-quot/td-p/4...)
Now I'm going to uninstall AR and wouldn't install it again unless I'll see some memory leak fixing update was published...