sorry,this is paul.i mistakenly put the wrong answer to the wrong question..quote.. Remove your viewing card, unplug from the mains socket and leave 1 minute. Plug your Sky box back in and leave it in standby for another minute. Press the "sky" button on your remote and allow the system to come back on then switch to a sky channel (sky 1 on 106 works fine) and wait for this system to prompt you to insert your viewing card. Put your card back in and your system will now work fine (until the next time!!!!) ..what you may need to do is..
The Sky+ box includes a Defrag (defragment) utility to tidy up the disk. To undertake this select the "Sky+ Planner rebuild" option from the Installer Menu. The Sky+ Planner Rebuild option performs a full defragmentation of the hard disk.
This utility is accessed from the Installer Menu - by pressing the 'Services' button then quickly afterwards press button 4, then 0, then 1, followed by the 'Select' button.
paul, May 2011