Did it ever work?
Version and service pack?
Network or standalone license?
Yes, It worked like a month ago. I dont know why it stopped working now. I installed service pack 4 recently. Version is 2013.
Its a network license.
what operating system?
a few things to try:
1. start solidworks as admin
2. login as admin
3. try disabling user account control
4. in solidworks rX try the option to start with new solidworks settings and see if it makes a difference
I have this problem now and then, and it's almost always because another computer has my license checked out (even though SW is closed; seems sometimes it closes without checking the license back in).
Check SolidWorks SolidNetWork License Manager to see if your license is available.