Hi Teej, just noticed noone got back to you.
I've don't know anything about this computer shop (as i'm in a different country) maybe someone else can give you a better answer regardign that...
but yes - it is possible for software to cause complete failure of hard drives...some very nasty viruses have been known to do this.
That being said, if it happens every 6 months...it could be one or many, of many things.
Perhaps the
ram in the laptop isn't that great? hard drive could be failing. Or there is a bad sector on the hard drive that gets used every 6 months.
I'd suggest finding out exactly what model it is, get the serial number (underneath near the battery), and contact IBM regarding this issue. They will be able to help over the phone or at least tell you a bit more about it then "your windows needs to be reinstalled".
Alot of "lazy" companies prefer just to format a computer instead of actually discovering what is wrong with the computer...in turn hiding the real cause and having it come back after a period of time.