Staff spotted two broken parts near Old Street Station, east London, on 8 March after a passenger train driver reported water pouring on to the train's roof.
Microsoft has also admitted to a range of other slips with the launch of Windows 8, including failing to do enough to train retail staff and educate potential customers about the new software, as well as not focusing all of its financial incentives behind the touchscreen PCs that show off Windows 8 to best advantage.
Nina Walker, of Woburn in suburban Boston, said she had to shovel about 8 inches of snow off her driveway before driving to Boston's South Station to take atrain to New York.