You know what? It's
still working after several hours now. I'm really surprised. I'll do some more testing before i conclude that the problem is completely gone but so far so good!
Here are the steps i did, if other people have the same problem and would like to give it a go.
1. Uninstalled Shareport 1.10
2. Uninstalled the Antivirus software. In my case AVG 8.0 Free edition.
3. Rebooted the computer (it will probably ask for this after the uninstallation).
3. After rebooting I did a full registry clean and normal clean with
CCleaner.
4. Installed Shareport 1.10
I think the only imporant step here is the regclean (to clean up after earlier shareport version), because my other computer doesn't even have antivirus installed, but you might as well do all the steps while you're at it.