@Starnuria: Hi,
Have you tried installing the following patches :
- 32-bit Windows 7 :
https://www.microsoft.com/en-us/download/details.aspx?id=45588
- 64-bit Windows 7 :
https://www.microsoft.com/en-us/download/details.aspx?id=45633
Many reports that those solve the issue on Windows 7.
Good luck !