My 360 was all fine and normal till after the power surge and power cut on Thursday. A nearby power plant that brings power to Harlow was hit by Lightning on that day and in the evening we had a power cut so both caused the problem to my 360. It started playing up a day later.
So it not faulty it just sods law with the lightning storm on Thursday. The pendrive was in my computer when it was on when the surge happened, luckly my PC wasn't damaged and only my USB was. But luckly 98% of the data was already backed up so no real lose and my 360 hardrive is fine as well it just the console that got affected by these events on thursday.