Help with my sister's comp

Looks like that thing is FUBAR'd.

 

As a first step, try talking her through booting Windows into Safe Mode.. See if the fonts are hosed in there, too..

 

Might try this:
http://coding-passion.blogspot.com/2009/01/fixing-corrupt-fonts-windows-xp.html

 

If that doesn't fix it try installing MalwareBytes then do a "full scan" and see if that fixes anything. Also if there is a malware/virus process running it won't be able to be removed with MalwareBytes and you need to run Rkill (DL link below) and then run MalwareBytes. If none of that works it is time for a reformat.


Rkill download link

If when you run Rkill, a message comes up saying that "Rkill is a virus" or something like that, that is just the malware trying to trick you. Leave the message open (do not click "OK") and run Rkill again. It should shut down all known malware processes and allow MalwareBytes to remove the threats.

 

Here's a site with multiple instances of this occurring and multiple threads covering different fixes. You might spend a little time and give some of them a read.

http://www.computing.net/cgi-bin/AT-search.cgi?mode=concept&sp=sp&search=wingdings&forum=ALL&x=0&y=0

 

OR, have her run out and buy a Mac!