Buffer overrun detected and other problems

[cowdog23]

I'm having some mad issues with my computer right now. Originally I thought it was the vundo virus which i got ride of using vundofix. But I'm still having alot of problems. First of all I'm getting this message saying "buffer overrun detected c:\windows\explorer.exe". Also my mozilla is going really slowly so i have to use internet explorer. In IE ads and wierd porn ads keep popping up and trying to install things on the computer. I'm going to post my hijack log and somebody please help me.

 

[cowdog23]

Hijack Log

I attached the hijack log becuase its too big to post on the thread. Help please