Again, these forums are no longer supported so please contact via email in future :)
The 5 minute issues (crashes and buffering) are caused by AVG and Avast on the new windows update and how they interact with chrome. There's nothing we can do at this point :( but to fix the problem you can disable your antivirus or put an exception in for chrome, and then reboot chrome with chrome://restart!
OK Matt I put path C:\Program Files (x86)\Google\Chrome\Application as exception in Avast and the problems about buffering solve with this workaround. Thx!