When ever I use the search function in windows xp professional with the advanced search options I get a lock up of the search function and I usally get the search folder that does not close. Also I get a data execution prevention error. I have Comodo firewall installed and Node 32 antivirus. If I don't use advanced search options, the program does not lock up. I have scanned for virus with several on line services, there are no virus on the computer. To unlock to computer screen, I must go into windows task manager and the programs that I must stop to unlock the computer are DR. Watson and usally there are more than 1 running at at time. I have tried about everything that I can think of including reinstalling windows which did not help. I am running a MSI K8n Neo 4 with 64xs 4600 AMD processer with 2 g memory. Mem tested the memory OK. New build with new power supply. What would cause this. No new software installed.