An expected clock interrupt was not received on a secondary processor in an
MP system within the allocated interval. This indicates that the specified
processor is hung and not processing interrupts.
This is what shows up in the dump file. It seems to have caught QQ.exe which might be some type of software from Tencent. If you know what this is, you might check for an update, if not, can you remove it. It might be something like Symantec catching or interrupting something, but updates would not hurt.
Edit: Your first dump file caught ccsvchst.exe which seems to be part of Norton. Perhaps this link to Norton will help.
Seeing as device drivers are the easiest, and cheapest (free), best to go for that option first. But Saltgrass is right, Norton does not have a very good reputation. Even with Seven. Replace Norton with BSOD friendly Microsoft Security Essentials as its replacement. Make sure Windows firewall is enabled!