Well for certain your friend wont need to reformat ther hard disc because of a browser problem.. Chrom seems to be having a lot of issues recently for a lot of people On linux and windows..
If as you say it all works OK on IE then the problem is Chrome Browser.. the flash part of chrome is an issue with some as it uses its own version (Pepperflash) which seems to have a few odd things happen on flash based things..
Try using a different Browser.. Fire fox probably would be the first most say.... I am using a Lighter version of FF called "Palemoon" which is lighter on resources than full FF
Palemoon Browser
but there are a lot of browsers for Windows
Reformatting Discs is rarely needed