hi all, having a lot of trouble with my box keeps on freezing and when changing channel takes about 10 seconds to change and while its trying to change channels I get the vix symbol going around in top lelf hand corner , I have back dated my software right back to the very first 4.2 and also tried different 4.2 versions and also removed all plugins but still getting the same issues ...I am thinking of doing a factory reset , clearing all data on hard drive , and putting the new 4.2 version on USB stick and starting from scratch , could do with a bit of help if I go down this route ie how to clear my hard drive Ext ext any advise I would be grateful ,, thanks