Win 7 x64 Home Premium - USB 2 HDMI stopped working

[senglory]

After installation of DisplayLink s/w v 7.0 my USB display stopped working. Even if I manually scan for hardware changes and point the HW manager at the folder "C:\Program Files\DisplayLink Core Software\" if can't find a suitable driver for this device. Tried to remove 7.0 and install 6.X version - the same result; the device is marked with yellow exclamation and obviously doesn't work. At the same time it works being attached to another laptop, but all USB ports on my main laptop are 100% working. I would like to know how to resolve this issue. Thanks.