when i run mbam it runs 5 secounds into a scan ethier quick or full and then it freezes my computer up i have to manually hold the power button and restart avg runs fine and doesnt find any infections ive uninstalled and reinstalled mbam any ideas whats up?

AVG is being a real pain in the neck lately. Try turning it off while scanning, and see if that helps.

Please exclude the following files from your antivirus:

For Windows XP:

• C:\Program Files\Malwarebytes' Anti-Malware\mbam.exe
• C:\Program Files\Malwarebytes' Anti-Malware\mbamgui.exe
• C:\Program Files\Malwarebytes' Anti-Malware\mbamservice.exe
• C:\Documents and Settings\All Users\Application Data\Malwarebytes' Anti-Malware\rules.ref
• C:\Windows\System32\drivers\mbam.sys
• C:\Windows\System32\drivers\mbamswissarmy.sys

Note: If using a software firewall besides the built in Windows Firewall you'll need to exclude them from it as well

If you are running Windows Vista or 7 let me know as some of the file locations are different, also let me know if you are running a 64 bit version of Windows as that changes things as well.