First off....welcome aboard kaleun
Secondly....what are your laptop specs :hmm:
Third....there are plenty of folk around these shores and most problems have already been experienced by others and sorted so post the info and watch the advice come flooding in
Can we presume you are not trying to use Rub and GWX in the same install :hmm:
If that is the case did you follow these steps before installing GWX ?
Delete any/all SH3 files from C\MyDocuments
Install a clean version of SH3 in C\Program Files\Ubisoft\SH3
Patched it to 1.4b
Copied the folder and pasted it to whatever drive you wanted.
Renamed the folder ‘GWX’
Installed GWX and ran it. (not forgetting the Dec23rd patch-installed via JSGME)